10-inch Student Mannheim
Frederick Post model 1446  [1936-40]
Hughes-Owens model 1768
Hemmi model 40

Appears in 1936 Catalog and Price Lists through 1940 and again in 1949-50.

Top edge: Blank
Bottom edge: Blank
Back of slide:[S, L, T]
Back of rule: Table on plastic

This page is from the 1936 (18th Edition) Post Catalog