»Prototype:
Early American Adding Machine«,
1860s
So far unknown 7-row
adder, probably corresponding to U.S.-Patent No. 31,016 by Joseph Harris.
No 2nd example is known worldwide! A superbly rare and early collector's
item!
Estimate: € 2,000/3,000
US$ 3,100/4,650
Reserve: € 1,500/US$ 2,330
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