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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Circular and Spiral Slide Rules
Aristo / 623 Commerz III
Aristo
Germany
Plastic
1960-1975
Ø 12.2 cm
Business
Notes:
Later yellow/green version. Embellished with a conversion scale and multiple gauge marks for converting imperial to metric.
Image 1
Image 2
Image 3
Image 4
