"The Adder", 1868
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The Adder, 1868
The first 2-disc brass adder by C.H. Webb, New York. The early model on wooden base. US patent: 10 March 1868.
"The Adder" – Das Ur-Modell, 1868
Erstes Modell des 2-Scheiben-Addierers mit Zehnerübertragung. Von C.H. Webb, New York. Frühes Messingmodell auf Holzsockel. U.S.-Patent: 10.03.1868. – Literatur: Martin, S. 67.
Start Price: € 120
The first 2-disc brass adder by C.H. Webb, New York. The early model on wooden base. US patent: 10 March 1868.
"The Adder" – Das Ur-Modell, 1868
Erstes Modell des 2-Scheiben-Addierers mit Zehnerübertragung. Von C.H. Webb, New York. Frühes Messingmodell auf Holzsockel. U.S.-Patent: 10.03.1868. – Literatur: Martin, S. 67.
Start Price: € 120
Condition
(3/3)
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- 22.3%
"The Adder", 1868
Estimate €200 - €400
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