Ricoh 1051SE, Engineering Rule

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Country of manufacture: Japan,            Date of manufacture: ____       Date Code: WS-3L
Overall length: 32.0 cm,          Width: 4.1 cm,           Weight: 107.6 gms
Materials: Celluloid Laminate over bamboo, metal end braces, adjustable
Cursor: 3.0 X 5.3 X 1.2 cms; metal framed plastic lens, adjustable; lines = single line, front and back
Scales: 20
Front: LL1, L, DF [ CF, CIF, CI, C ] D, LL3, LL2
Back: K, A [ B, K, S, T1, T2,C ] D, DI, dB
Gauge Marks: [ π, C, e, √10, ρ'', ρ', ρ^o, unknown V (62 on C scale on back of rule) ]
Condition: C2-C3 (Mint to Very Minimal signs of use)
Came with: Ricoh Slide Rule Tables insert card, orig. light blue/dark blue plastic case

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