F.339 Data Sheet MJS-p-0287

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Sandish, Spring Calculator, c.1940

Serial Number or Date Stamp:

Country: USA

Primary construction material: wd

Case included?: no

General Description: Specialty linear spring slide rule

Length of 1 decade = 4 in, and overall scale length = 18 in. The largest physical dimension is 20 in.

Front Scales: Pounds [ Nspr ] [ WireDiam ] CoilDiam

Back Scales:

Notes: apparent home-made dual-slide spring calculation slide rule; traced by F. Sandish; original owner M.L. Rowe

References: no info available

Date Acquired: 12/19/2022