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© WADDINGTON'S AUCTIONS, Toronto, ON, Canada, Toronto, ON, Canada
Thatcher s Calculating Instrument Keuffel & Esser New York 19th century model 4012 ~Patented by Edwin Thatcher C.E. Nov. 1st 1881 mahogany cased 6.75"...
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- THATCHERS CALCULATING INSTRUMENT BY
KEUFFEL &ESSER CO., NY, 1910, IN WOODEN FITTED CASE WITH A MODERN COPY OF THE INSTRUCTION MANUAL. BOX SIZE 6 1/4" HIGH X 24" WIDE X 6 1/2" DEEP. TOP IS CRACKED....
[more like this] - Thatcher s Calculating Instrument Keuffel
& Esser New York 19th century model 4012 ~Patented by Edwin Thatcher C.E. Nov. 1st 1881 mahogany cased 6.75" (height) 17.1cm (height) 24" (width) 61cm (width) 6.75" (depth)...
[more like this] - Thatcher's calculating instrument,
brass mounted wooden drum calculating multiplication, division, proportion and powers, last patent date 1920, Keuffel & Esser, No. 4012, with original instruction manual,...
[more like this] - Thatcher's calculating instrument,
brass mounted wooden drum for calculating multiplication, division, proportion and powers, last patent date 1932, 6-3/4 x 24-1/2 in., in finger jointed mahogany case marked...
[more like this] - THATCHER'S CALCULATING INSTRUMENT BY
KEUFFEL & ESSER CO. Model 4012 No. 5715. Cylindrical slide rule having an inner rotating cylinder. Turned wooden knobs on each end of the cylinder.Paper label with instructions...
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