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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Disk
"Time, Distance, Speed Computer"
Davis Instrument Corp.
USA
Plastic
"est, 1960's"
Dia. = 15 cm
General Purpose
Notes:
"Simple slide rule for time, distance and speed calculations using multiplication and division"
Image 1
Image 2
