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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
PERRYGRAF / Cox Stadia 3100
PERRYGRAF
USA
Plastic
1960s
Ø 12.7 cm
Surveying
Notes:
Reproduction of W. & L. E. Gurley's version from circa 1920. Given the NSN on the back it was originally part of a batch ordered by the US government.
Image 1
Image 2
Image 3
