F.103 Data Sheet MJS-p-0318

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Graphic Calculator, Percentage Calculator, 1962

Serial Number or Date Stamp:

Country: USA

Primary construction material: pl

Case included?: no

General Description: Specialty circular ratio/proportion slide rule

Length of 1 decade = 5 in, and overall scale length = 16 in. The largest physical dimension is 6 in.

Front Scales: D [ C ]

Back Scales:

Notes: Circular Proportions Rule, made in nearby Barrington, IL

References: https://sliderulemuseum.com/MiscUSA.htm#GraphicCalculator

Date Acquired: 08/02/2023