German/DDR Slide Rules
(Manufacturers and Countries not found in their own gallery)

KEEP ISRM FREE!
Donations are
tax deductable

This gallery is dedicated to slide rules and manufacturers located within Germany, including pre-Berlin Wall, DDR Eastern Germany. The DDR slide rules, RS, Reiss, Meissner KG, Veb Mantissa came from the region of Dresden and Bad Liebenswerda and were manufactured from 1882 through 1984. Note: Belgium has three official languages and is in the France gallery, even though Dutch and German is spoken more often than French. Switzerland has four official languages one of which is German, but has been placed in its own gallery.

Manufacturers in this gallery:
ALKU (ALfred HUhmann)
Controller Calculator KG
Ecobra
Fedra
Friedmann
H-H Universum
IWA
Karl-Wess
Joe Klawun
Koch, Huxhold and Hanneman

Meissner
Norma
Reiss
REWA
Rista
Schacht & Westerich
Seehas
Staedtler
Standardgraph
Veb EAW
Veb Mantissa
Wichmann

ALKU Rechenschieberfabrik, ALfred KUhmann

REF ALKU Rechenschieber	ALKU Rechenschieber Made in Neueibau, East Germany, Designed by Alfred Kuhmann, c1945 Front Scale: A [ B, R(CI), C ] D Back - Blank Note the 7" long main substrate, stator and slides are made of glass with the scales made of paper laminate. Archive - Scan Donated by Nathan Zeldes, Israel. Instructions, 2 pgs (200Kb PDF)
ALKU Rechenschieberifabrik Neugersdorf 7/387/4001 Rietz ISRM 22.03.25.01	ALKU Rechenschieberifabrik Neugersdorf 7/387/4001 Rietz Made in Germany - 25cm RR Track Scales Front Scale: 25cm // K, A [ D, CI, B ] C, L \|\| 27.5 Back Scale: S (cos), Tan (Cot) Original owner: Dr. A. Lorenz (written on sleeve with notes.) Gift Of Nancy Ulrich. Husband Ted Ulrich's Collection.

Controller Calculator Schnelirechner KG
CONTROLLER - Rechen-Scheiben

REF Controller Circular Slide Rule 75mm Diameter	Controller Circular Slide Rule 75mm Diameter Made in Munich, West Germany, bu Controller Calculator KG, DGRM, c1959 Front Scale: C ( D, A, K) Back - Conversions Archive - Scan Donated by Rod Lovett Collection. Instructions, 1965-1966 (German) (4.82MB PDF)
Controller Circular Slide Rule 75mm Diameter 1970 ISRM 13.03.15.02	Controller Circular Slide Rule 75mm Diameter 1970 Made in Munich, West Germany, bu Controller Calculator KG, DGRM, 1970 Front Scale: C ( D, A, K) Back - Conversions Warranty Number: 705/3433R Instructions, 1970 (German) (6.2MB PDF)
REF Controller 110R Circular Slide Rule 110mm Diameter	Controller 110R Circular Slide Rule 110mm Diameter Made in Munich, West Germany, bu Controller Calculator KG, DGRM, c1961 Front Scale: C ( D, A, K) Back - Conversions Archive - Scan Donated by Giovanna Breda Collection.
REF Controller 110R Circular Slide Rule Version 2 110mm Diameter	Controller 110R Circular Slide Rule Version 2 110mm Diameter Made in Munich, West Germany, by Controller Calculator KG, DGRM, c1961 Front Scale: C ( D, A, K) Back - Conversions Archive - Scan Donated by Giovanna Breda Collection.
Controller 110R Circular Slide Rule Version 3 110mm Diameter ISRM 13.03.15.03	Controller 110R Circular Slide Rule Version 3 110mm Diameter Made in Munich, West Germany, by Controller Calculator KG, DGRM, 1970 Front Scale: C ( D, A, K) Back - Conversions Warranty Number: 705/5433Y Instructions, 1970 (German) (6.2MB PDF)
REF Controller 200R Circular Slide Rule 220mm Diameter	Controller 200R Circular Slide Rule 220mm Diameter Made in Munich, West Germany, by Controller Calculator KG, DGRM, c1961 Front Scale: C ( D, A, K) Back - Conversions Archive - Hermann's Slide Rule Catalogue.

Bayerische Reisszeugfabrik

ECOBRA or Ecobra was a brand name of Bayerische Reisszeugfabrik, a Nuremberg maker of drawing instruments that was purchased by Joseph Dietzgen in 1909. The company began producing slide rules before World War II, and after the war, Eugene Dietzgen Company of Chicago distributed ECOBRA rules in the United States. Metal rules were more popular in the United States than they were in Europe._{Reference: Dieter von Jezierski, Slide Rules: A Journey Through Three Centuries trans. Rodger Shepherd (Mendham, N.J.: Astragal Press, 2000), 34-35, 52-53.}


Ecobra 1260 All-Aluminum Lot312 ISRM 20.04.01.381	Ecobra 1260 All-Aluminum Lot312 Made in Germany - c1940 - all aluminum Front Scale (extended scales - no labels) 14cm // A [ B, C ] D Back scale: [ S, L, T ] Gift Of Philip Stanley, Worchester, Massachusettes
Ecobra 1270 REF P106	Ecobra 1270 Pocket - Closed simplex Made in Germany - c1940 - all aluminum Front Scale (unmarked): 14cm // A [ B, C ] D Back Adv: Aluminum Company of Canada
Ecobra Rietz R141 REF	Ecobra Rietz R141 Made in Germany - c1960 - Plastic Front Scale: 13cm // A [ B, CI, C ] D, K Archive - W. Girbardt (Univ Greifswald, Germany) Collection
Ecobra Darmstadt R143 REF P257	Ecobra Rietz R141 Made in Germany - c1960 - Plastic Front Scale: 13cm // LL2, LL3, A [ B, CI, C ] D, K, LL1 Back Scale: P, T Cot, L, S Cos Back Adv: INA-Nadellager
Ecobra 154 Cosmos REF	Ecobra 154 Cosmos Made in Germany - Plastic - Identical to Hope 530 Front Scale (extended) LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, Ll2, LL1 Back Scale: T Cot, ST ST, DF [ CF, CIF, CI, C ] D, P, S Cos Archive - Rod Lovette Collection
Ecobra 1460 REF	Ecobra 1460 Made in Germany - c1950 Front Scale (extended Scales): 14cm // K, A [ B, R, C ] D, Lg Cursor: Multiple hairlines Archive - Scan provided by Cassou Olivier (France) Collection
Ecobra 1461 System Rietz Lot 47 ISRM 22.07.06.69	Ecobra 1461 System Rietz Lot 47 Made in Germany/La Porte - c1950 for Garcia Commercial in Puerto Rico. Flat lens, Painted aluminum (Peeling off). Metal cursor bars (Similar to early Picketts) Front Scale: K, A [ B, R, C ] D, lg Back Scale: 5in [ sin, tg ] Sleeve promo: Garcia Commercial. Inc. Meteriales de Constructión. San Juan - Davamón, Puerto Rico. Gift Of Cindy Tate, Bozeman, Montana. Victor B. Tate collection.
Ecobra 1461 System Rietz Lot 40 ISRM 20.04.01.368	Ecobra 1461 System Rietz Lot 40 Made in Germany - c1950 - Painted aluminum Front Scale: K, A [ B, R, C ] D, lg Back Scale: 5in [ sin, tg ] Original owner: Don Hodge (on box) Sleeve promo: RefractariosMadison-Walker - FLIR Gift Of Philip Stanley, Worchester, Massachusettes.
Ecobra 1500 REF	Ecobra 1500 Made in Germany - c1940 - all aluminum Front Scale: 25cm // K, A [ B, CI, C ] D, L Archive - W. Girbardt (Univ Greifswald, Germany)Collection
Ecobra 1611 Darmstadt Special ISRM 09.01.12.106	Ecobra 1611 Darmstadt Special Made in Germany - Painted Aluminum Front Scale (extended) T Cot, S Cos, DF [ CF, CI, C ] D, P Back Scale: K, A [ B, Lg, C ] LL3, LL2, LL1 Donated by David Hecht, Alexandria, VA
Ecobra 1711 Cosmos REF	Ecobra 1711 Cosmos Made in Germany - Aluminum Front Scale (extended) LL02, LL03, DF [ CF, CIF, L, CI, C ] D, LL3, Ll2, Back Scale: LL01, K, A [ B, T<45 Cot, T>45 Cot, ST, S Cos ] D, P, S , LL1 Archive - Rod Lovette Collection

Fedra

Fedra Log Log
ISRM 06.08.04.01

Fedra Log Log - Closed duplex - DC Aug1968
Made in East Germany possibly by Veb Mantissa
Front Scale: K, A [ B, CI, C ] D, L
Back Scale: 27cm, S, ST, T, LL1, LL2, LL3, 10.75Inch
Back Slide: [Greek Alphabet]
Same as Staedtler Mars 544-52 Log Log
Donated by Seth Balish

Note: This model is available in the Slide Rule Loaner Program supplied through the generosity of Skip Zogopoulos, Exeter, NH who has donated over 200 of these slide rules to ISRM as well as many other items to support the activities of the museum.

Friedmann, Germany

Little is known about this brand. There was a Friedman Bros of New York, which made (or distributed) Drafting tools (ca1935), marked "Freidman Germany" but it is not confirmed if this is the same family, The slide rule and cursor design is similar to Faber-Castell who rebranded slide rules. According to J¨ergen Nestler in Germany, Friedmann was a representitive and distributor for Faber-Castell.

Friedmann 4in Pocket Mannheim P182	Friedmann 4in Pocket Mannheim Made in Germany Front Scale: A [ B, CI, C ] D, K Back Scale: [ S, L, T ]
Friedmann Mannheim ISRM 18.09.28.01	Friedmann Mannheim Made in Germany, c1930 (Possibly by Nestler or Faber Castell) Note: Railroad Track style scales, Riveted Laminations Front Scale[Extended] 11inch // A [ B, CI, C ] D \|\| 11inch Back Scale: [ S, L, T ] Original Owner: (marked on back of stock), R.J. Eastwick

Höhler - Hohen Neuendorf Company

H-H was founded by A.A. Höhler (the first "H") in 1945 as Präzisionswerk Hohen Neuendorf A.A. Höhler, Hohen Neuendorf bei Berlin, Annemariestraße 27. Hohen Neuendorf (the second "H") is a town in the Oberhavel district, in Brandenburg, Germany. It is located north west of Berlin. The "Chronicle of the Municipality of Hohen Neuendorf from the Beginnings to 1995" has a record stating the A.A. Höhler produced slide rules with two workers. Prior to 1945 the records also show other workshops, potential forerunners of H-H, as Schlecht & Roth, Mechanical Workshop, Oranienburger Str. 74; Ewald Schlecht 1944, parts for slide rules, jigs and lighters; and Ewald Schlecht 1945, 3000 slide rules produced, 3 employees. Höhler may have worked for, or ended up taking over these other enterprises. Product ceased by the end of the 1950s.Only the Rietz design seems to exist. See expanded H-H Universum history by George Schriber (translated from German by Andreas Faßbender).

H-H Universum System Rietz REF P255	H-H Universum System Rietz Made in Germany - 1935-1942 Front Scale - Extended 22cm // A [ B, CI, C ] D, L \\ 22cm Back Scale: [ S, T ] Multilined Cursor Back: Conversions (German)
H-H Universum System Rietz ISRM 22.03.01.13	H-H Universum System Rietz Made in Germany - 1935-1942 Front Scale - Extended 30cm // K, A [ B, CI, C ] D, L \\ 1.25 x 100 Back Scale: [ S, T ] Multilined Cursor Back: Conversions (German - faded) Instructions (German)Courtesy of Mike Syphers

IWA - Ingenieurerbüro für Wirtschafliches Arbeiten

IWA RECHENSHIEBERFABRIK, F.Riehle KG, 73 Esslingen a.N. - Kuferstr. 13, West Germany, is most famous for its slide charts and circular calculators. These in this gallery more resemble generic slide rules with log scales. From the beginning IWA was specialized in the development and design of data slide as well as their manufacturing. Approximately 10% were designed by their customers. The reamaining 90% were developed as exclusive IWA mdels or designed against the technicall specifications of the customers.

IWA Company and Manufacturing Prosseses Information (English and German)
From 1924-1962 the scales on cardboard data slides were designed manually with ink on paper. Typographic printing was used. Texts and numbers were manually composed with lead letters, and then pressed into a zinch cliche. After 1962, all cardboard data slides were offset printed. From 1924-1930 the plastic slides were lithograph printed. From 1930-1960 lithograph printing was used.In 1960 screenprint in combination with offset was used and the surface of the plastic reinforced by varnishing and/or laminating.

IWA 0257 PIA-Electronic ISRM 21,08,19.01	IWA 0257 PIA-Electronic Made in Germany for Dutch firm De Muiderkring N.V.- c1963 Front Scale: 14cm, A [ B, Cap pF, Inductance µH, C] D, Frequency 10kHz to 500 MHz, Wavelength feet, meters, 5.5in Back Scale: U2/U1, db, X [ sin, lg, tg ] Resistor Color Code Multilined Cursor: p, pk, q, p, pk
IWA 0272 Electronic REF	IWA 0272 Electronic Made in Germany for Dutch firm De Muiderkring N.V.- c1963 Front Scale - Extended Lambda, Omega, f [ C, L, R_C ] L/C, R_L Back Scale: K, Sin Cos, A [ B, CI, C ] D, Ln, 25cm Multilined Cursor Archive - scan by Tom Cattrall IWA-0272 Muiderkring electronic Instructions for the MK slide rule. (English) Manual Scan provided By David Walker, UK
REF IWA 01206 Machining - Roughness Slide Rule for Turning	IWA 01206 Machining - Roughness Slide Rule for Turning Made in Germany - c1971 Front Scale - Extended 26 cm // r (4 scales), feed [ V in m.min ] Ra, Rt \\ 10.2 inches Back: Direction in English and German Archive - scan by Jim Cerney
IWA 1633 System Wern	IWA 1633 System Wern - Decimal Point Slide Rule Calculator Designed in Sweden and Made in Germany by IWA - 1966 Designed in Sweden and Made in Germany - 1966 21 cm square. Scale labels are on the runner (cursor). Archive - Images downloaded from wern-inter.net Instruction Manual (1.6 MB PDF)

IWA 1638 System Wern ABC (1966)
ISRM 20.08.31.01

Carl R. Wern created the slide rule design layout together with his two younger brothers George H. Wern and Lars A. Wern in Sweden year 1966. It was a new approach to simplify slide rule computing work for all categories including decimalpoint location.

IWA 1638 System Wern ABC - Decimal Point Slide Rule Calculator
Designed in Sweden and Made in Germany - 1966
21 cm square. Scale labels are on the runner (cursor).
Gift of Carl R. Wern, George H. Wern and Lars A. Wern of Sweden.
wern-inter.net

Instruction Manual (2 MB PDF)

Karl-Wess

Karl Wess
REF P125

Karl Wess - Closed simplex
Made in Germany(?Aristo)
Front Scale: 13cm // A [ B, CI, C ] D, K || 5inch
Back Slider: [ S, L, T ]

Joe Franz Klawun
Feinmessinstitut (FeinmeBinstitut) Klawun, Berlin - Charlottenburg 5

Klawun (Nestler) System Klawun (20inch/50cm) Commerz
ISRM 21.05.22.01

Sleeve Logos

Klawun (Nestler) System Klawun (20inch/50cm) Commerz
Front Scale: 55cm // KZ [ T, VAT p%, E T ] V Z
Back Scale: [ sh/d, %pound;]
Cursor Hairlines" Q, KW, PS, d
Note: Railroad track style scales scales

Feinmessinstitut Joe Klawun No.11 Mannheim (Nestler No.2) ISRM 13.09.16.03	Feinmessinstitut Joe Klawun No.11 Mannheim(Nestler No.2) Made in Germany by Albert Nestler for Feinmessinstitut Joe Klawun, Berlin-Charlottenburg 5 Note: Nestler model 2 Front Scale: A [ B, C ] D Back Slide: [ S, Lg, T ] Cursor: Missing, see Nestle No. 9 for proper cursor. Back: Blank
Feinmessinstitut Joe Klawun No.25 Sys.Rietz (Dec 1938) ISRM 13.09.16.03	Feinmessinstitut Joe Klawun No.25 Sys.Rietz dc38-12 Made in Germany by Faber-Castell for Feinmessinstitut Joe Klawun, Berlin Note: Faber model No 1/94/394. "Railroad track" style divisions Front Scale (extended) scales labeled 27cm // K, A [ B, CI, C ] D, L \|\| 10inch Back Slide: [ S Cos, ST, T Ctg ] Cursor: Metal framed Back: Conversions (German) Original Owner: Spordeler (on back of stock)
REF Feinmessinstitut Klawun No.31C	Feinmessinstitut Klawun No.31C Made in Germany by Faber-Castell Front Scale (extended) 14cm // K, A [ B, CI, C ] D, L Back Scale: S, ST, T archive - Andreas Tabak Collection, The Netherlands
Castell Klawan No.81 (1957) ISRM 20.04.10.183	Castell Klawan No.81 (Aug 1957) Made in Germany by Faber Castell for A. Klawan, Hanover. Front Scale(extended) 14cm(fine divisions). Lg // K, A [ B, CI, C ] D, P, \\ Sin Cos,tg Cot Back slider: [ LL1, LL2, LL3 ] Multiple hairlines Back: Spintex Prazisions-Erzeugnisse promo. Gifted by the Philip Stanley Collection
REF Feinmessinstitut Klawun Rietz No.100	Feinmessinstitut Klawun Rietz No.100 Made in Germany by Faber-Castell Front Scale (extended) 27cm // K, A [ B, CI, C ] D, L Back Scale: Sin, Sin/Tg, Tg archive - Andreas Tabak Collection, The Netherlands
REF Feinmessinstitut Klawun Rietz No.100 Hanover	Feinmessinstitut Klawun Rietz No.100 Hanover Made in Germany by Faber-Castell Front Scale (extended) 27cm // K, A [ B, CI, C ] D, L Back Scale: Unknown, but assumed to be S, SRT, T archive - Andreas Tabak Collection, The Netherlands
REF Feinmessinstitut Klawun No.125 LL Hanover	Feinmessinstitut Klawun No.125 LL Hanover Made in Germany by Faber-Castell Front Scale (extended) 27cm // K, A [ B, L, CI, C ] S, ST, T1, T2 Back Scale: LL2, S', LL1 Multi-lined Cursor archive - Andreas Tabak Collection, The Netherlands
P258 Joe Klawun No. 666/T	Joe Klawun No. 666/T - Closed simplex Made in Germany (identical to Nestler 11-ZM) Feinmessinstitut Klawun Front Scale (extended) 13cm // A [ B, C ] D Back: Blank
Feinmessinstitut Klawun Aristo 0908 TriLog (1973) ISRM 12.06.02.01	Feinmessinstitut Klawun Aristo 0908 TriLog (dc3LR37) Made in Germany by D&P for Klawun Feinmessinstitut Hanover Front Scale: T1. T2, A [ B, BI, CI, C ] D, P, S , ST Back Scale: LL1, LL2, LL3, DF [ CF, CIF, CI, C ] D, L, K Multiple hairlines: PS, KW Donated by Ted Hume, Texas
Joe Klawun No1001/S - System Klawun (Business Rule) Der Rechenstab des Kaufmanns - System Klawun ISRM 11.12.15.03	Joe Klawun No1001/S - System Klawun (Business Rule) Made in Germany by Albert Nestler for Feinmessinstitut Klawun Front Scale (extended) 27cm // DF (KZ) [ CF (T), (CI) Val. (p%), (C) E (T) ] (D) V (Z) \|\| 10 inch Back Slide Scale: [ sh/d (-sh/d), £ (lg)] Back : Instructions (German) Note 1: Z = Zins (interest): K = Kapital (principal); p = Zinsfuss (interest rate); T = Tage (days). Note 2: The DF/CF scales are folded at 3.6. Note 3: At right end of back is a slogan: "Alles was Rechnen erleichtert liefert Klawun" Translated to English: "Klawun delivers everything that makes calculation easier."

Koch, Huxhold and Hanneman Hamburg, Germany

The timeline in terms of the company name and its change and change back is a bit more difficult. KHH was founded on December 16, 1909 by William Albert Klaus Diederich Koch, John Carl Rudolf Huxhold, and Carl Fritz Emil Hannemann. Some texts say they were former employees of Dennert & Pape. William Koch died in mid 1930 and shares in the company went to his son Wilhelm Arnold Chrisitan Koch, but he did not stay with the firm past 1943. The firm applied to register "Huxhold & Hannemann, Hansestadt Hamburg" as the new name, but the factory was totally destroyed in the war before it was used on any products. The factory ws set on fire and completely obliterated during an air raid on Hamburg by the Royal Air Force on July 21, 1942. John Huxhold died at the age of 66 just before the air raid and so was saved from having to see his factory bombed. The official end of KHH is documented with the deletion from the commercial register on August 30, 1944

George Schreiber writes in his book that suspects that not only was the name change entered late in the commercial register, but that the familiar old company name will also continue to be used on the slide rules for the time being. Slide rules which bears the name KHH are rare, those with "Huxhold & Hannemann Hamburg" even rarer.Taken from the book of George Schreiber:.
Expanded history at Recenschieber.org Who Were Koch, Huxhold & Hannemann? These are know firms that rebranded or sold KHH slide rules: Gebr. Wichmann; Schacht & Westerich, Hamburg; R. Reiss, Bad Liebenwerda; Alfred Martz, Stuttgart; Marabu, Stuttgart; Johann Faber AG, N�rnberg; Rudolf Neumann, Leipzig; Walter Pfeffer Nachf., Halle - Saale; Ernst Sokopf, Bremen; Gustav L�hr, Lemgo; Friedrich Korte, Braunschweig; MAHO, Pfronten; Plenio Reisszeuge; Emil Pfenninger & Co, Z�rich; Ahrend, Niederlande; A. Lietz, San Francisco; Frederick Post Co, Chicago; M.D.S., London Hughes Owens Company, Canada; Kahn Fr�res, Br�ssel; Vain� Korpinen Oy, Helsinki; Ohico Holdings BV, Niederlande; Otto Schleiffelder, Wien; Freidmann, USA.

Frederick Post 1452 - US Patent 1/81722 (c1924)
REF S443

Frederick Post 1452 - Closed Simplex
Made in Germany by Koch, Huxhold & Hanneman - US Patent 1/81722
Note 5-slot stock with adjustmnent screws on edge
Front Scale: 10 // A [ B, CI, C ] D, K || 26cm
Back Scale: [ S, L, T ]
Back: Table of Constants

1924

1925-32
Examples of KHH/Frederick Post cursors. Courtesy of Mike Sypher collection

Meissner KG

Meissner KG Darmstadt ISRM 20.04.01.367	Meissner KG Darmstadt Made in DDR/Germany - Same factory as Veb Mantissa Front Scale: 13cm // K, A, DF [ CF, CIF, CI, C ] D, P, S, T Back Slider: [ LL1, LL2, LL3, L ] Cursor: multiple hairlines Gift Of Philip Stanley Collection
Meissner KG Multi Pocket ISRM 20.04.01.399	Meissner KG Multi Pocket (1974) Made in DDR/Germany - Same factory as Veb Mantissa Front Scale: 13cm // ST, A, DF [ CF, CIF, CI, C ] D, P, S, T Back Slider: [ LL1, LL2, LL3, L ] Cursor: multiple hairlines Gift Of Philip Stanley Collection
REF Meissner KG Mono Rietz 731-541	Meissner KG Mono Rietz 731-541 Made in DDR/Germany - Same factory as Veb Mantissa Front Scale: L, K, A[ B, CI, C ] D, S, T, ST Back Slider (unverified): [ LL1, LL2, LL3, L ] Archive - Courtesy of www.oldjurnal.narod.ru

Norma Rechenscheibe

Norma Grafia 190 REF	Norma Grafia 190 Made in Germany DBRG Front Scale: C ( D ) Guage marks for the Graphics/Typography Industry Back: Blank Archive - Scan by Hubert van Dongen Collection
Norma Mercuria 190 REF	Norma Mercuria 190 Made in Germany DBRG Front Scale: C ( D, DI, %, %, constants ) Guage marks for the Graphics/Typography Industry Back: Blank Archive - Scan by Rod Lovette Collection
Norma Rieger 190 REF	Norma Rieger 190 Made in Germany DBRG Front Scale: C ( D ) Guage marks for the Graphics/Typography Industry Back: Blank Archive - Scan by Rod Lovette Collection

Reiss

Bad Liebenwerda, (East)Germany

Reiss Pocket Simplex
REF P002

Reiss Simplex
Made in Germany - brushed aluminum
Front Scale: 13 CM // A [ B, C ] D
Back Scale
[ Sin, Log, Tg ]

Reiss Darmstadt DDR
ISRM 04.07.03.01-D7

Reiss Darmstadt DDR
Made in East Germany - Brushed Aluminum
Front Scale: K, A [ B, CI, C ] D, L
Back Scale: Cos, Sin/Tg [ LL1, LL2, ll3 ] sin, tg
Cursor: 4 hairlines

Reiss 3201 Rietz-Spezial
ISRM 09.02.28.01

Reiss 3201 Rietz-Spezial
Made in Germany - brushed aluminum
Front Scale
L, DF [ CF, CIF, C ] D, DI
Back Scale (extended)
ST, T [ K, B, C ] S, P

Reiss 60/0015 Rietz
ISRM 13.01.08.02

Reiss 60/0015 Rietz - dc 749
Made in Germany - brushed aluminum. Has "2" on one end of stock and slide for matching parts.
Front Scale (extended): 28cm / K, A [ B, CI, C ] D, L
Back Scale (has rear hairline): [ Sin, Sin/tg, tg ]
Note: This specimen is missing its cursor. See below.

This slide rule was owned by Susanne Petersson's brother, Andeas, who recalls that his grandmother, gave this to him along with a set of drafting tools. Another donation of a Metric Converter slide rule is in the Sterling gallery
In Family photo on left: Grandmother, Susanne, sister Sylvia, brother Andreas

Reiss Rietz
REF S038

Reiss Rietz
Made in East Germany - Brushed Aluminum
Front Scale: K, A [ B, CI, C ] D, L
Back Slider
[ Sin, Arc, Tan ]
Cursor: 4 hairlines - PS, KW

Reiss 3209 Pocket Simplex
REF

Reiss 3209 Simplex (1972)
Made in Germany - brushed aluminum. Metal framed cursor
Front Scale (extended)
13 CM // K, A [ B, CI, C ] D, L
Back Scale (not verified):[ Sin, Tg ]
Archive - Gerhard Wenzel collection

Reiss 3209 Pocket Simplex
REF

Reiss 3209 Simplex (1975)
Made in Germany - brushed aluminum, molded plastic cursor
Front Scale (extended)
13 CM // K, A [ B, CI, C ] D, L
Back Scale:[ Sin, Tg ]
Archive - Keith Beckman collection

Reiss 3212 Pocket
ISRM 18.04.06.142

Reiss 3212 Pocket
Made in Germany - Plastic
Front Scale (extended scales)
13cm // K, A [ B, CI, C ] D, L
Back Scale: [ sin, tg ]
Cursor: 3 hairlines
Gift Of Leroy Hausler Collection

Reiss 3214 Darmstadt-Record
ISRM 18.04.06.33

Reiss 3214 Darmstadt-Record
Made in Germany - Plastic
Front Scale (extended scales)
L, K, A [ B, CI, C ] D, LL1, LL2, LL3
Back Scale: P, S, ST, DF [ CF, CIF, CI, C ] D, T1, T2, DI
Cursor: 3 hairlines
Original owner: Sckerr Peter Schwerin
Gift Of Leroy Hausler Collection

Reiss 3223 Progress
REF

Reiss 3223 Progress
Made in East Germany DDR - Brushed Aluminum
Front Scale: A, DF [ CF, CI, C ] D, L
Back Scale: T1, T2 [ LL1, LL2, ll3 ] D, S, Cos
Cursor: All plastic cursor. Very unique design.
Archive - Scan by Steve Seale Collection

Reiss 3227 (Log Log Vector) Duplex
REF

Reiss 3227 (Log Log Vector) Duplex
Made in Germany - Plastic
Front Scale (extended scales)
K, T1, T2, DI, A [ Sh1, Sh2, Sz, C ] D, Sk, P, ST, L
Back Scale: LL00, LL01, LL02, LL03, DF [ CF, CIF, BI, CI, C ] D, LL3, LL2, LL1, LL0
Cursor: 3 hairlines
Archive - Scan by Steve Seale Collection

S198 Reiss 3236 Darmstadt

Reiss 3236 Darmstadt - Duplex
Made in Germany - Plastic
Front Scale (extended scales)
K, A [ B, CI, C ] D, L
Back Scale: P, S [ LL1, LL2, ll3 ] T1, T2
Cursor: 3 hairlines

Reiss Rietz Pocket
ISRM 09.01.12.107

Reiss Rietz Pocket
Made in Germany - Plastic
Front Scale: 13cm // K, A [ B, CI, C ] D, L
Back Scale: [ S, T]
Cursor: 3 hairlines
Donated by David Hecht, Alexandria, VA

Reiss DDR Pocket Darmstadt Pocket
ISRM 22.03.01.106
Replace 09.01.12.108

Reiss DDR Pocket Darmstadt Pocket
Made in East Germany - Plastic
Front Scale: 15cm // K, A DF [ CF, CIF, CI, C ] D, P, S, T
Back Scale: [ LL1, LL2, LL3, L]
Cursor: 4 hairlines
Gift Of Philip E. Stanley

REWA

REWA 10M Rechenwalze Cylindrical Slide Rule (c.1910)
REF

REWA 10M Rechenwalze Cylindrical Slide Rule
Made in Germany
Cylindrical C & D scales in 50 sections
Note: Similar to Daemen-Schmid 10 m Rechenwalze, but some details are different. May be a copy. Right end of cylinder marked: "A.H. Nitschke. Straupitz-Hirschberg in Schl." Only example known. Smaller 3-m REWA sold at Breker auction in 2007. The REWA brand is unknown to Heinz Joss, the Swiss specialist on cylindrical slide rules. REWA may be an abbreviation for REchenWAlze.
Archive - Ed Chamberlain Collection.

E. O. Richter

E. O. Richter (c1841-1907) founded the firm in Chemnitz, Saxony, after training as a clockmaker. In 1892 he patented his 'flat system', copied by many other makers after his patent ran out in 1905. Firm became a VEB Kombinat (i.e. a state owned company) in 1945. Richter instruments continued to be made in the DDR until the 1980s at least. (text by David Riches, UK)


Richter Rietz 11 SRC32841	Richter Rietz 11 Made in Denmark by UTO for E.O.Richter Front Scale: 13cm // K, A [ B, CI, C ] D, L Back Scale: [ S, S&T, T Archive - Scan from Hermann's Slide Rule Catalog
Richter Electro 22 SRC32841	Richter Electro 22 Made in Denmark by UTO for E.O.Richter Front Scale: 13cm // Dyn/Mot, Volt, A(KW) [ B, CI, C ] D, &# 966;, &# 966;, L Back Scale: [ S, S&T, T Archive - Scan from Hermann's Slide Rule Catalog
Richter Rietz 1 REF	Richter Rietz 1 Made in Denmark by UTO for E.O.Richter Front Scale: 27cm // K, A [ B, CI, C ] D, L Back Scale: [ S, S&T, T ] Archive - Scan By Giovanni Breda Collection
Richter Darmstadt 3 REF	Richter Darmstadt 3 Made in Denmark by UTO for E.O.Richter Front Scale: 27cm // L, K, A [ B, CI, C ] D, P, T, Cot, S, Cos Back Scale: [ LL1, LL2, LL3 ] Archive - Scan By Giovanni Breda Collection

Rista

S259 Rista Rietz 1

Rista Rietz 1
Made in Germany - Plastic
Front Scale: K, A [ B, CI, C ] D, L
Back Slider
[ S, S&T, T ]
Cursor: 4 hairlines

Schacht & Westerich, Hamburg, Germany

In 1826 Heinrich Wilhelm Conrad Schacht received a lottery ticket from his boss, which gave him a considerable cash gain. He was able to open his first paper shop at the age of 24: "Conrad Schacht". In only nine years, Schacht succeeded in establishing a successful business and building its own paper manufacturing. In 1835, Schacht died after a short illness and Conrad Schacht's widow quickly decided to hand over the business to a friend of the family, Adolph Westerich and on 1 July 1835 took over the management. In 1842, a large fire destroyed many Hamburg buildings, including the paper treatment Schacht. Three years later, in May 1845, Westerich again opened the doors of the action, but with a new address and from 1846 also under a new name: "Schacht & Westerich". When Adolph Westerich retired in 1870, he left his nephew Eduard a solid and popular Hamburg company. It was only in 1995 that Manfred Westerich, the last managing director of the Westerich family, left the company.

Schacht & Westerich System Cuntz Slide Rule

Schacht & Westerich System Cuntz (Complex Number) Slide Rule
Made in Germany by Schacht & Westerich of Hamburg
Front Scale: L, 0.1t, 0.1s, 0.01st, d²π/4, nπ, ∛(H₁HT₂), ∛(Z₁ZT₂), ∛(E₁T₂M₃), d√(Z₁T₂HT₃), d√(E₁H₂ZT₃) [ Q+1 ] n²³, 1:n
Back: 15 cm., 6 in.
Slide Back: blank
Note: In 1916, Cuntz patented the ST, S and T scales, all refering to D. This is today's standard. He also developed 1-unit 20 inch Square Root and 30-inch Cube Root scales, both refering to D. (used on today's Pickett DUAL-BASE Rules).
Scans provided Powerhouse Museum, Sydney, Australia and the Steve Searle Collection, Tennessee
This slide rule has extra scales which can be used for many different forms of calculations. It was designed and patented (in 1916) by one Gregor Rudolf Ferdinand Heinrich Cuntz of Hamburg, Germany. The primary intention of this slide rule arrangement seems to be to keep the orders of magnitude of numbers, ie, the position of the decimal point, as easily ascertainable as possible. The arrangement also allows for all the various roots, circular and trigonometric numbers to be available in one view along the cursor hairline. Refs: [G.R.F.H. Cuntz, US Patent document No. 1168059]. Dieter von Jezierski "System Cuntz, an outstanding slide rule and its story" Slide Rule Gazette, Issue 4, Autumn 2003, p.85.

Schacht & Westerich System Cuntz Slide Rule

Seehase, Dr. Ing.

Design based on German patent DE727007, 4 September 1939 by Dr. Ing. Hans Seehase.

Dr. Ing. Seehase Pocket
ISRM 18.07.11.10

Dr. Ing. Seehase Pocket - Complimetary Advertising - c1950
Made in Germany
Note: Made from stiff cardboard and plastic film. If you pull the slide out all the way the top and bottom scales fall out, too.
Front Scale: A [ B, C ] D
Back Advertisement: The Leece-Nevill Company, Cleveland. A manufacturer of Automotive Voltage Regulators (1909-1969)
Gifted by Phil Stanley of Worcster, Massachussettes

Philip Stanley retired from engineering to become a full-time dealer in and appraiser of antique scientific instruments and tools as The Analytical Engine. He has written two books on antique measuring instruments, and numerous articles on instruments and technology, and has given several talks on these subjects. Phil appeared on the Antiques Road Show on PBS, as an appraiser, in 2012, 2013, 2014.

REF Dr. Ing. Seehase Pocket

Dr. Ing. Seehase Pocket - Advertising - c1950
Made in Germany
Front Scale: A [ B, C ] D
Back Scale: 5inch [] 13cm Back: Automotive Products Company, London.
Archive - Herman's Slide Rule Catalogue

REF Dr. Ing. Seehase - Elektro Praktikus

Dr. Ing. Seehase - Elektro Praktikus - c1950
Made in Germany - Alternating Current (power) Calculator
Front Scale: m [ A, V ][ qmm ] Cos (phase)
Back Scale:
qm [ Lx, Lp ][ Watt ] n (eta)
Note: two slides
Archive - Herman's Slide Rule Catalogue

REF Dr. Ing. Seehase - Träger-rechenstab

Dr. Ing. Seehase - Träger-rechenstab - c1950
Made in Germany - Structural Calculator
Front Scale: cm [ m, cm ] Kg/m²
Back Slide:
[ m, (nomograph), cm ]
Back: Reference Tables, Nomographs
Archive - Herman's Slide Rule Catalogue

REF Dr. Ing. Seehase - Sonderrechenstab SR 704

Dr. Ing. Seehase - Sonderrechenstab SR 704 - c1950
Made in Germany - Spring Design Calculator
Front Scale: Wire dia [ Radius of coil, Kg/cm² ] P gramm (force)
Archive - Herman's Slide Rule Catalogue

REF Dr. Ing. Seehase - Sonderrechenstab SR 705

Dr. Ing. Seehase - Sonderrechenstab SR 705 - c1950
Made in Germany - Spring Design Calculator
Front Scale: Number of coils [Wire dia, Radius of coil][stress, P (force) Kg/cm² ] f (Travel) mm
Note: Two slides
Archive - Herman's Slide Rule Catalogue

Staedtler Mars 54401 Darmstadt ISRM 17.05.22.06	Staedtler Mars 54401 Darmstadt Made in Germany Note: No scale labels. Nestler equivalents label on back. Front Scale: 10.5 // L, K, A [ B, CI, C ] D, P, S Cos, T Cot Back Scale: Equivalents (english) [ LL1, LL2, LL3] Donated by Pamela Eaton Collection of Dennis, Massachusettes
Staedtler Mars 54401 Darmstadt ISRM 07.02.12.02	Staedtler Mars 54401 Darmstadt - 1961 Made in Germany Front Scale: 10.5 // L, K, A [ B, CI, C ] D, P, S Cos, T Cot Back Scale: Equivalents (english) [ LL1, LL2, LL3] Donated by Russell Fox, Anchorgae, Alaska. This slide rule, and another in the Aristo gallerty, was used by Russel Fox's father who purchased it in Germany 1961-1964. His father worked as an Electrical Engineer with BPA in Portland, Oregon.
S093 Staedtler Mars 544LL	Staedtler Mars 544LL - Open Simplex Made in Germany Front Scale: L, K, A [ B, CI, C ] D, S (Cos), ST, T (Cot) Back Slider 25cm [ S, LL1, LL2, LL3] 10 inch
Staedtler 544-08 Log Log Duplex (1963) ISRM 22.07.06.48	Staedtler 544-08 Log Log Duplex - date code 563 Made in Germany by Nestler. Metal Braces.Plastic stock. Front Scale: CT, T, ST, DF [ CF, CIF, CI, C ] D, P, S CS Back Scale: LL01,LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Gift Of Cindy Tate of Bozeman, Montana. Victor B. Tate II Collection.
REF Staedtler Mars 544-28 Log Log	Staedtler Mars 544-28 Log Log - dc969 ( Sep 1969) Made in Germany by Nestler (same as Nestler 0292) Front Scale: P, S Cos, T1 Cot1, T2 Cot2, A [ B, K, CI, C ] D, R1, R2, L, ST Back Scale: LL00, LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1, LL0 Multilined Cursor: kW, HP Archive - Larry Kehl collection
S548 Staedtler Mars 544-52 Log Log	Staedtler Mars 544-52 Log Log (Jan 1969) Made in Germany - date code 169 Front Scale: K, A [ B, CI, C ] D, L Back Scale: 25cm, S, ST, T, LL1, LL2, LL3, 10 inch Multilined Cursor: kg/m, S, kW, HP
Staedtler Mars 544-55 Rietz-Scolaria ISRM 17.05.22.13	Staedtler Mars 544-55 Rietz-Scolaria Date code 160 (Jan 1960) Made in Germany - date code 160 Front Scale: K, A [ B, CI, C ] D, L Back Scale: S, ST, T Back of Slide: Blank: Multilined Cursor: kg/m, S, kW, HP Gift Pam Eaton of Dennis, Massachussettes.
Staedtler Mars 544-55 Rietz-Scolaria ISRM 14.01.10.18	Staedtler Mars 544-55 Rietz-Scolaria (Feb 1962) Made in Germany - date code 262 Front Scale: K, A [ B, CI, C ] D, L Back Scale: S, ST, T Back of Slide: Blank: Multilined Cursor: kg/m, S, kW, HP Gift of the Bill Wehrend Collection, Palo Alto, California.
Staedtler-Noris 944-02 ISRM 04.09.20.01-D7	Staedtler-Noris 944-02 - Open simplex Made in Japan Front Scale: L, K, A [ B, CI, C ] D, S, ST, T Back Scale 25cm [S, LL1, Ll2, Ll3 ] 10in
S131 Staedtler-Noris 944-03	Staedtler-Noris_944-03 - Open simplex Made in Japan Front Scale: T1, T2, K, A [ B, CI, C ] D, S, ST, L Back blank
Staedtler Mars 944-24 (1969) REF	Staedtler Mars 944-24 - date code T.S.6 Made in Japan by Relay/Ricoh Front Scale: LL0, L, K, A [ B, S Cos, ST ST, T Cot, C ] D, DI, P, LL0 Back Scale: LL1,LL2, LL3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 Scan provided by the Steve Seale Collection, Nashville, Tennessee
Staedtler Mars 944-28 Log Log REF	Staedtler Mars 944-28 Log Log Made in Germany by Nestler (same as Nestler 0292) Front Scale: L, K, A [ B, ST, T Cot, S Cos, C ] D, DI, LL0, LL-0 Back Scale: LL-1, LL-2, LL-3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 Multilined Cursor: C, kW, HP Scan provided by the Steve Seale Collection, Nashville, Tennessee
Staedtler Mars 944-82 Log Log ISRM 09.01.12.109	Staedtler Mars 944-82 Log Log Made in Japan Front Scale: T1 (Cot1), T2 (Cot2), DF [ CF, CIF, S' (Cos), C ] D, (P), S (Cos), ST (ST) Back Scale: LL0, L, K, A [ B, BI, CI, C ] D, LL3, LL2, LL1 Multilined Cursor: kW, HP Donated by David Hecht, Alexandria, VA
P178 Staedtler-Noris 945-03	Staedtler-Noris 945-03 - Closed Made in Japan Front Scale: 5in // K, A [ B, CI, C ] D, L Back scale: [ S, ST, T ]

Standardgraph

REF - Standardgraph No. 910 Disco-Rietz

Standardgraph No. 910 Disco-Rietz
Made in West Germany c1960 - 12.8cm diameter
Front Scale - L, CI, C ( D, Sin Cos, Tg Ctg, R)
Archive - Scan donated by John Krijnen, Netherlands

VEB Electro-Apparate-Werke (EAW)

VEB Electro-Apparate-Werke (EAW) PocketI
SRM 09.01.12.109

Veb VEB Electro-Apparate-Werke (EAW) Pocket- c1946
Made by Berlin-Treptow, DDR Germany - wood stock with plastic laminate
Front Scale: 13cm // K, A[ B, CI, C ] D, L
Back Scale: [ sin, sin/tg, tg ]
Donated by David Hecht, Alexandria, VA

Note: VEB Electro-Apparate-Werke, later renamed Berlin-Treptow, was a public owned company founded in 1928 by Friedrich Ebert and made radios, relays and control equipment. Berlin-Treptow was one of the largest manufacturers of electric appliances in the GDR and had 8,000 employees. After Stalin's death the factory was renamed EAR JW Stalin. The company was privatized in 1993.

Veb-Mantissa


P107 Veb Mantissa Multi Pocket	Veb Mantissa Multi Pocket - Closed simplex Made in DDR/Germany Front Scale: 13cm // ST, A, DF [ CF, CIF, CI, C ] D, P, S, T Back Slider: [ LL1, LL2, LL3, L ] Cursor: 3 hairlines
Veb Mantissa Record 1731-421 ISRM 04.10.12.01-D7	Veb Mantissa Record 1731-421 Made in DDR/Germany Front Scale: L, K, A [ B, CI, C ] D, LL1, LL2, LL3 Back Scale: P, S, ST, DF [ CF, CIF, CI, C ] D, T1, T2, DI
REF Veb Mantissa Trim LL 1731-433	REF Veb Mantissa Trim LL 1731-433 Made in DDR/Germany Front Scale: P, S, K, A [ B, L, CI, C ] D, T1, T2, DI Back Scale: LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 Archive - Rod Lovett Collection
S200 Veb Mantissa 1731-511 Rietz	Veb Mantissa 1731-511 Rietz - Duplex Made in DDR/Germany Front Scale: K, A [ B, CI, C ] D, L Back Scale: [ S, ST, T ] Cursor: 3 hairlines
S163 Veb Mantissa Darmstadt II 1731 523/4	Veb Mantissa Darmstadt II 1731-523/4 Made in DDR/Germany Front Scale: K, A [ B, CI, C ] D, L Back Scale: P, ST [ LL1, LL2, LL3] D, T, S
S059 Veb Mantissa Mono Rietz 1731-541	Veb Mantissa Mono Rietz 1731-541 - Simplex Made in DDR/Germany Front Scale: L, K, A [ B, CI, C ] D, S, T, ST Back Slider: Blank Cursor: 3 hairlines
Veb Mantissa Mono Rietz 1731 541 ISRM 09.01.12.105	Veb Mantissa Mono Rietz 1731 541 Made in DDR/Germany Front Scale: L, K, A [ B, CI, C ] D, S, T, ST Back: Blank Donated by David Hecht of Alexandria, Virginia
Veb Mantissa Variant_II 1731-573/4 REF	Veb Mantissa Variant_II 1731-573/4 Made in DDR/Germany Front Scale: ST, T, K, A [ B, CI, C ] D, P, S Back Scale: 25cm, L, DF [ CF, CIF,, C ] D, LL1, LL2, LL3 Archive - Scan by Steve Seale Collection, Nashville, Tennessee.
Veb Mantissa Erdgas-verbrennung rechenschieber Natural gas combustion Slide Rule REF	Veb Mantissa Erdgas-verbrennung rechenschieber Made in DDR/Germany for Freiberg Fuel Institute (1969) Note: This slide rule has specialized scaled dealing with volume, flow rates, pressure and specific gravity relative to the natural gas industry. Front Scale: 1:g[kg/m_n³], 2, 3, 4 [ 5, 6, 7, 8 ] 9, 10, 11, 12 Back Scale: 1, 2, 3 [ 4, 5 ] 6, 7, 8 Archive - Scan by Steve Seale Collection, Nashville, Tennessee.
Veb Mantissa Feutron Klima-Rechenstab 1802 Climate and Humidity Slide Rule REF	Veb Mantissa Feutron Klima-Rechenstab 1802 Made in DDR/Germany by VEB Manyissa for Feutron, Greiz, Germany (c1971) Note: This slide rule has specialized scaled dealing with Climate And Humidity. Front Scale: Wasserdampfgehalt (g/kg), Taupunkttemperatur (&dec;C) [ Trockenthermometer, Gesamtdruck (760 Torr), absolute Luftfeuchte (g/m³) Feuchtthermometer (&dec;C), Warmeinheit (kcal/kg) ] Back Scale: Wasserdampfgehalt (g/m³), Warmeinheit (kcal/kg) [ Lufttemperatur (&dec;C), Saettigungsdampfdruck (Torr) ] Partialdampfdruck (Torr), Wasserdampfanteil (%) Archive - Scan by Steve Seale Collection, Nashville, Tennessee.

Gebr. Wichmann (Wichmann Brothers), Berlin

!904-1905 Wichmann Catalog (Slide rule pages)

Gebr. Wichmann Slide Rule in Locomotive Data Book 1912 ISRM 20.04.10.068 Alba B. Johnson, Jr. Photo postcard with Mother 1905 Atlantic City, New Jersey; Alba Boardman Johnson in 1910, father; 19th Regiment in 1911.	Gebr. Wichmann Slide Rule in Locomotive Data Book 1912 Slide Rule Made in Germany, by Gebr. Wichmann. Book Published by The Baldwin Locomotive Works, Philadelphia, PA Size: 6-1/4 inchesa x 1-3/4 inches x 1/8 inch paperboard construction. knife-edge cursor. Slide rule included as part of the Locomotive Data Book Published 1912 by The Baldwin Locomotive Works, Philedelphi, PA. Front scales: A [B, C] D Original owner: Alba B. Johnson, Jr. (1888-1938). His father, Alba Boardman Johnson (1858-1935), was the President of Baldwin Locomotive Works in 1911 which created this book. The junior has copious amounts of hand written math and calculation notes in the back pages of the book. He was a 1910 graduate of Princeton University and worked for Baldwin Locomotive Works. In 1911, he was a First Lieutenant, 19th Regiment Engineers (Railway), American Expeditionary Forces. In 1920, he was the foreign sales representitive of the Foundry Equipment Export Corp. in London, England. He later became an oil executive associated with the export sales department of the Atlantic Refining Company. He died in Montgomery, PA after a week's illness, just three years after his father died. His father's estate was worth $3 million in 1935. Gift of Philip Stanley Collection Instructions (177MB pdf) 1921
Gebr. Wichman Pocket Watch Slide Rule (1938) ISRM 15.09.27.07	Gebr. Wichmann Pocket Watch Slide Rule (1938) Made in Berlin, Germany. Note: Also in Pocket Watch gallery. 70mm diameter x 10mm Front scales: ?, A ( B ?, ? ) Back scales: sin, F (G1, G2, G3, G4) Note: This specimen has a cellulois lens that have faded and warped. There was excessive abrasion on one side from the lens that wiped of the scales. It's hard to see the scales so another scan was performed with the lens removed. It was then noticed that the stem which spins the center dials was missing.
Wichmann Bros. Mannheim (D&P) REF	Wichmann Bros. Mannheim (D&P) Made in Germany by Dennert & Pape for Gebr. Wichmann m.b.h. (Wichmann Brothers) Front Scale: 25cm // A [ B, C ] D \|\| 28cm Back scale: [S, L, T ] Well: 27cm - 54cm Archive - Scan provided by Andreas Fassbender Collection
Gebr, Wichmann 431 REF	Gebr. Wichmann 431 c1900 Made in Berlin, Germany by Wichmann Brothers - Paper composite with brass chisel cursor Front Scale: A [ B, C ] D Back: Blank Archive - Ed Chamberlain Collection
Gebr. Wichmann 466 REF	Gebr. Wichmann 466 c1900 Made in Berlin, Germany by Wichmann Brothers - Paper composite with brass chisel cursor Front Scale: A [ B, C ] D Back: Blank Archive - Ed Chamberlain Collection
Gebr. Wichmann 1327-1/2 REF	Gebr. Wichmann 1327-1/2 Made in Germany by Gebr. Wichmann m.b.h. (Wichmann Brothers) Front Scale: A [ B, C ] D Archive - Herman van Herwijnen's SR Catalogue
Gebr. Wichmann Nr.1427 Mannheim ISRM 22.07.06.09	Gebr. Wichmann Nr.1427 Mannheim Made in Germany by Gebr. Wichmann m.b.h. (Wichmann Brothers) Front Scale: 27cm // A [ B, C ] D \|\| 1:25 Back Scale: [ S, S&T, T ] Back Equivalents (German) Gift Of Cindy Tate of Bozeman, Montana. Victor B. Tate II Collection.
Wichmann 4428 REF	Gebr. Wichmann 4428 Made in Germany by Gebr. Wichmann m.b.h. (Wichmann Brothers) Front Scale: A [ B, C ] D Back scale: 27.2cm [S, L, T ] 10.75in Archive - Scan provided by Mark D. Sutton
Wichmann Berlin Electro REF	Wichmann Berlin Electro Made in Germany by Koch, Huxhold & Hanneman for the Wichmann Brothers Front Scale: 16cm // LL1, A(KW) [ B(mm², P), C (W) ] D, LL2 Back scale: unknown Well: Dynamo, Motor efficiency n=% Archive - Scan provided by Andreas Poshinger of Germany

German/DDR Slide Rules (Manufacturers and Countries not found in their own gallery)