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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Linear / Disks
SA-706
Westinghouse
USA
Plastic
c. 1941
Dia. = 9.1 cm
Lighting Industry
Notes:
Used to calculate incandescent lamp room lighting for various wattage lamps and room size
Image 1
Image 2
