F.118 Data Sheet MJS-p-0417

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Hemmi, 150, 1936-40

Serial Number or Date Stamp:

Country: JPN

Primary construction material: bb

Case included?: no

General Description: Basic linear polyphase duplex slide rule

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

Front Scales: DF [ CF CIF C ] D

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

Notes: Post 1458; pre-WWII; Hemmi’s first duplex rule; Universal Duplex

References: https://sliderulemuseum.com/srtco/PostCrossRef.shtml

Date Acquired: 04/20/2026