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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Disk
System Ing. E.W. Hiltpold
E.E. Hiltpold
"Zuerich, switzerland"
Celluloid and plastic
1941 to 1947
diam 10 cm
General Calculations
Notes:
"Unique semi-circular design (235 degrees), 9 scales plus a 7 cm ruler"
Image 1
Image 2
Image 3
