F.6 Data Sheet 6

American Blueprint, Military, 1948-1957

Serial Number or Date Stamp:

Country: USA Primary construction material: wd Case included?: yes

Length of 1 decade = 10 in, and overall scale length = 10 in. The largest physical dimension is 12 in.

Front Scales: OppAngDeg OppAngMils [ ApexAngMils ApexAngDeg CI C ] D A

Back Scales: [ T ST S C ]

Notes: US Military slide rule, for field artillery problems

References: https://sliderulemuseum.com/Military/S189_AmericanBlueprintMilitaryRule.jpg

Date Acquired: 06/04/2021