Loga Topo 6400 A ^o/oo Stadia Circular Rule

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Country of manufacture: Switzerland,            Date of manufacture: ____,      Serial No.: 1034
Diameter: 12.6 cm,      Weight: 130.2 gms
Materals: metal and printed cardboard disks.
Cursor: Independently operated transparent plastic cursors, one line on front and back
Scales: 10
Front: C, S, T, ST
Back: n², A [ B, sin-cos, cos², sin-cos ]
Gauge Marks: [ π, ρ (1019) ]
Condition: C2 (Mint but no manual)
Came with: Original brown zippered leather case

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