Archive
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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Disk
Gilson Binary (Dietzgen 1797B)
Gilson
USA
Aluminum
1940's to 1960
Dia = 21.1 cm
"Multiplication, division, trig"
Notes:
"Early binary without colored segments, note 1940 date and 1931 date replaced with Made in USA"
Image 1
Image 2
Image 3
