Archive of Collections



Details and Image



TypeModel No.MakerCountryConstruction
Material
DateScale LengthArea of Use
Disk / Plate
Norman K. Spielman
Norman K. SpielmanUSA
Plastic
est. 1960's16.8 cm x 17 cmIndustrial Sanitation

Notes: "Provides extensive moving scales for pipe diameter, flow rate, slope and other related calculations"


Image 1




Image 2