F.35 Data Sheet MJS-p-0238

Concise, 270, c.1955

Serial Number or Date Stamp:

Country: JPN Primary construction material: pl Case included?: yes

General Description: Basic circular polyphase slide rule

Length of 1 decade = 12 in, and overall scale length = 12 in. The largest physical dimension is 4 in.

Front Scales: L D [ C CI A K ]

Back Scales: DI D [ S T1 T2 ST ]

Notes: very early model?; red lettering; brown case

References: https://www.sliderulemuseum.com/Concise.htm

Date Acquired: 01/11/2022