Aristo 958 Geodat (360°)

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Country of manufacture: Germany,            Date of manufacture: May, 1957,      Date Code: 575
Overall length: 33.9 cm,          Width: 4.8 cm.,           Weight: 103.1 gms.
Materials: All plastic, glued-on plastic end braces on back side.
Cursor: 3.8 X 5.7 X 0.7 cms; All-plastic, detachable; lines = two lines on front, three on back
Scales: 22, extensions on x (back side) and x²
Front: ctg, tg, arc, πx [ πx, 1/πx, 1/x, x ] x, √(1-x²), sin, cos
Back: 1-cos (0.001-0.1M), 1-cos (0.1-10M), x² [ x², 1/tan(α/2), sin cos, cos² ] x, lg x, x³
Gauge Marks: [ π, ρ'' (2063), ρ' (3438)]
Condition: C4 (Minimal Signs of Use)
Came with: Original gray cardboard box/case, zippered felt case

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