Concise Circular Slide Rule and Reference Tables, GTE Sylvania Lighting Products Group

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Country of manufacture: Japan,            Date of manufacture: ____
Overall Height: 11.0 cm,          Width: 7.5 cm
Materials: All plastic
Scales: 8
Front: D [ C, CI, L, A, S, T, ST]
Gauge Marks: [ π, C (1128), 1/M (2304], R, 2π]
Condition: C3-C4 (Very Minimal to Minimal signs of use)
Came with: black plastic case and instructions

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