KLPZ 5161-57 Dual Slide r. 1962

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Country of manufacture: USSR,            Date of manufacture: 1962
Overall length: 28.1 cm,          Width: 3.8 cm,           Weight: 87.9 gms, rule and one slide
Materials: Celluloid laminate over wood
Cursor: 4.2 X 3.7 X 0.6 cms; metal framed glass lens; lines = single line, front only
Scales: 12 general scales, extensions on A, B, C, D; specialized scales on second slide (something to do with machining)
Front: 25 cms // K, A [ B, CI, C ] D, L || 1:2 scale
Slide Back: [ S, ST, T ]
Gauge Marks: [π, C, C1, M, ρ'', ρ', 6366 (also marked ρ'' ]
Back: Physical and numerical constants, conversion factors
Condition: C5 (signs of normal use)
Came with: Cardboard box with information insert

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Second Slide, front & back


Insert, front & back