Thatcher's Calculating Instrument
- Sold for:
- Science, Technology & Clocks - 2383
- Date / Time :
- October 28, 2007 10:00AM
Thatcher's Calculating Instrument, by Keuffel & Esser Co., New York, No. 4012, Serial No. 5343, patd. by Edwin Thatcher 1881, with inner sliding tube and outer paper-covered tables, on mahogany base with directions, wd. 21 1/2 in., in mahogany case with celluloid plaque and booklet.