Graphoplex 630 Surveyor's Slide Rule 400g

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Country of manufacture: France,            Date of manufacture: ____
Overall length: 29.4 cm,          Width: 4.6 cm,           Weight: 113.9 gms
Materials: alll plastic, simplex form
Cursor: 4.2 X 4.5 X 0.7 cms; all plastic, slightly magnifying; lines = three hairlines on front
Scales: 16, extensions on A, B, C, D
Front: 27 cm // L, B³, B [ [sin cos, cos², S&T, b ] B, B²,1/B²
Back; blank
Slide Back: sin, sin & tg, tg, b²
Gauge Marks: [π, C ρ_,,, ρ'', √ ]
Condition: C3 (Very minimal signs of use, but missing cursor window on back)
Came with: Original dark green plastic case, instructions (French)

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