F.253 Data Sheet MJS-p-0130

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P.A.S. Co., Engraving Rule, c.1928

Serial Number or Date Stamp:

Country: USA

Primary construction material: ss

Case included?: no

General Description: Specialty linear ratio/proportion slide rule

Length of 1 decade = 5.5 in, and overall scale length = 5.5 in. The largest physical dimension is 7 in.

Front Scales: D [ C C’ ] D’

Back Scales:

Notes: Engraving Proportion Scale; sold by Art Brown & Bro. Inc. NewYork; similar to Hyde Optical Slide Rule at ISRM

References: https://sliderulemuseum.com/MiscUSA/Hyde_Optical_SlideRule_Photographic_GiftOfPhilStanleyCollection.jpg

Date Acquired: 08/01/2020