Omega 151

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Country of manufacture: Japan (Ricoh/Relay 151),            Date of manufacture: 1961 (d.c. = J.S.-4)
Overall length: 35.5 cm,          Width: 4.7 cm,           Weight: 152.1 gms
Materials: Celluloid laminate over bamboo, plated metal end braces, adjustable
Cursor: 3.1 X 5.9 X 1.0 cms; all plastic, adjustable; lines = single line, front and back
Scales: 25, extensions on A, B, C, D
Front: LL-1, LL-2, LL-3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1
Back: LL-0, L, K, A [B, S, ST, T, C] D, DI, P, LL0
Gauge Marks: [ π, C, e, 1/e, ρ'', ρ', ρ^o ]
Condition: C2-C3 (Mint to Very minimal signs of use)
Came with: Original brown leather case, labeled "/rule images/Omega" on flap strap, and Relay on flap

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