Frederick Post model 1458 [1936-40]

10-inch Universal Duplex Slide Rule
Frederick Post model 1458 [1936-40]
Hughes Owens model 1765
Hemmi model 150

	These pages are from the 1936 (18th Edition) Post Catalog.
	Note: The rule illustrated in the catalog and the specimen are both 1-3/16 inch wide. Hemmi model 150 was widened to 1-5/8 inch about the time of WWII. There may be some specimens of Post 1458 that are 1-5/8 inch wide.