F.28 Data Sheet 28

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Concise, 270, c.1955

Serial Number or Date Stamp:

Country: JPN

Primary construction material: pl

Case included?: yes

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