F.3 Data Sheet MJS-p-0215

Acu-Rule, Acu-Math 90A, c.1945

Serial Number or Date Stamp:

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

General Description: Basic linear polyphase duplex slide rule

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

Front Scales: T DF [ CF CIF CI C ] D S ST

Back Scales: A [ B K L C ]

Notes: St. Louis, Mo., USA; Mannheim Trig; dimpled slide; special leather case; Acu Design pat. pending; owner R.W. Shutt, Tower City, Pa.

References: https://sliderulemuseum.com/Acumath.htm

Date Acquired: 09/13/2021