Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Novotni Slide Rule Co.U.S.A
Black Bakelite
1929 to 199233 cmSteel Industry

Notes: "1) Calculations to determine the weight of various metals, including steel, 2) Made for The By-Products Steel Corp., Philadelphia, Pa for customer use 3) Packed with an instruction manual in the original cardboard box"

Image 1