F.34 Data Sheet MJS-p-0080

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Charvoz-Roos, SR-109, 1942

Serial Number or Date Stamp:

Country: USA

Primary construction material: wd

Case included?: no

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: T DF [ CF CIF CI C ] D S ST

Back Scales: [ B K L C ]

Notes: Post 1457; Mannheim-Trig; WW-II; rough condition

References: http://www.oughtred.org/jos/articles/V09.2_p37-46.pdf

Date Acquired: 08/01/2020