Bidspirit auction | A Wottring Roto-Scope, Model 35N,

A Wottring Roto-Scope, Model 35N, Circa 1930s - 12 x 16 x 18 A Wottring Roto-Scope, Model 35N, manufactured by Wottring Instrument Co. of Lorain, Ohio, U.S.A., circa 1930s. The instrument features a substantial main body constructed of black textured metal, likely cast iron or steel with a crinkle finish, mounted on a heavy metal base. It includes an adjustable optical viewing apparatus with two eyepieces, along with several large control knobs and a toggle switch on its front panel, and a power cord extending from the side. A brass plaque clearly details the manufacturer and patent information, including ”MFD. UNDER PAT. NO. 1,840,482.” Further markings include a calibrated scale indicating ”PRISM DIOPTRE,” ”BASE IN,” ”BASE OUT,” ”BASE UP,” and ”BASE DOWN” measurements. Serial No. 7480.