F.3 Data Sheet MJS-p-0401

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Acu-Rule, Acu-Math 400, c.1968

Serial Number or Date Stamp:

Country: USA

Primary construction material: pl

Case included?: yes

General Description: Basic linear polyphase trig slide rule

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

Front Scales: S K A [ B CI C ] D L T

Back Scales:

Notes: Round corners, oval logo; made by Sterling Plastics

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

Date Acquired: 11/22/2025