Dietzgen 1757 PrimaTrig

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Country of manufacture: USA (by Acu-Rule)            Date of manufacture: ____
Overall length: 31.5 cm,          Width: 4.2 cm,           Weight: 101.4 gms
Materials: Plastic (PVC?), metal end braces on back, adjustable
Cursor: 2.7 X 5.9 X 0.8 cms; all plastic, adjustable; lines = single hairline, front only
Scales: 10, no extensions
Front: L, K, A [ B, CI, C ] D, T, ST, S
Back: Trig functions, mensuration formulae, decimal-fraction equivalents, conversion equivalents and set points
Gauge Marks: [π]
Condition: C3 (Very Mininal Signs of Use)
Came with: manual

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