This rule became model 1441 in the 1936
catalog and model 44DA-410 about 1972.
It was in the Post catalog longer than any other slide rule.
Top Edge: 0-4 inches (slant)
Bottom Edge: 0-10 cm (Vertical)
Back of Slide:[S, L, T]
Back: THE FREDERICK PSOT COMPANY NO. 1447M
@"SUN"@ HEMMI MADE IN JAPAN
Backing plate also has @"SUN"@ embossed
Page 13 from April 1932 price list.
|Same as Hemmi model 32
Note that Hemmi vest pocket rules did not have a CI scale until after WWII.