F.121 Data Sheet MJS-p-0315

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Hemmi, 30, 1968

Serial Number or Date Stamp: SD

Country: JPN

Primary construction material: bb

Case included?: yes

General Description: Basic linear polyphase slide rule

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

Front Scales: in /| A [ B CI C ] D

Back Scales: [ S L T ]

Notes: slight magnifier; Toyo Rock Drill, Mindrill Limited on back

References: http://hemmicat.srtco.us/

Date Acquired: 08/05/2023