21st Sep, 2017 12:00
Fine Instruments of Science & Medicine
A C&E Layton's Improved Arithmometer
a development of Samuel Tates design of the calculating machine invented by Thomas de Colmar, patents for 1907 and 1909, the instrument dated 1912
a development of Samuel Tates design of the calculating machine invented by Thomas de Colmar, patents for 1907 and 1909, the instrument dated 1912
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Auction: Fine Instruments of Science & Medicine, 21st Sep, 2017
