Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Universal Trignometric Combination
G.R. Flynn"Lowell, Mass, U.S.A."
p 1922diam 13.5 cmTrignometric

Notes: "Single side, double disk with five slide rule scales on the bottom half and trignometric scales on the top half, gold lettered leather case, has slots and cutouts showing scales and data."

Image 1

Image 2

Image 3