F.205 Data Sheet MJS-p-0251

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K&E, 4158, 1961

Serial Number or Date Stamp:

Country: USA

Primary construction material: pl

Case included?: yes

General Description: Basic linear polyphase slide rule

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

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

Back Scales:

Notes: New K12 variant of Beginner’s rule; only made for 1 year

References: https://www.mccoys-kecatalogs.com/KECollection/4058/ke4058familyrules.htm

Date Acquired: 03/21/2022