Fearns Circular Slide Rule & Trigonometric Calculator

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Country of manufacture: England,            Date of manufacture: ____,
Diameter: 12.8 cm,      Weight: 83.0 gms
Materals: plastic discs
Cursor: two independent plastic cursors, one line each on front and back cursor.
Scales: 10
Front: K, C [ D, B ] A, Log-Log (spiral), S, T
Back: V [ R or X, various windows for trig solutions
Gauge Marks: [ π]
Condition: C0-C1 (Mint with all extras; some may not be in mint condition)
Came with: Original black plastic case w/snap closure embossed "Hunter Associates, 792 Partridge Drive, Bridgewater, NJ 08807", Instruction leaflets for both the circular slide rule and the trigonometric calculator

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