Relay DT-1015 Duplex Trig

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Country of manufacture: Japan,            Date of manufacture: 1959
Overall length: 32.3 cm,          Width: 4.0 cm,           Weight: 122.5 gms
Materials: Celluloid laminate over bamboo, metal end braces, adjustable
Cursor: 3.2 X 5.2 X 1.0 cms; all plastic, adjustable; lines = single line, front and back
Scales: 19, no extensions
Front: L, LL1, DF [CF, CIF, CI, C ] D, LL3, LL2
Back: K, A [ B, S, ST, T, C] D, DI
Gauge Marks: [ π, C, e, 785, ρ'', ρ', ρ^o ]
Condition: C5 (signs of normal use; prior owner carved initials and an index mark on rule)
Came with: nothing

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