Thatcher's Calculating Instrument by Keuffel & Esser Co.
- Sold for:
- Clocks, Watches & Scientific Instruments - 2314
- Date / Time :
- November 03, 2005 10:00AM
Thatcher's Calculating Instrument by Keuffel & Esser Co., New York, No. 4012, Serial No. 4722, with inner sliding cylinder and outer twenty-bar rotating "envelope" with printed scales, on mahogany base with instruction label, wd. 21 1/2 in., direction booklet by Edwin Thatcher, and mahogany case with celluloid plaque Keuffel & Esser Co., Drawing Materials, Surveying Instruments, Measuring Tapes.