2 Calculating Devices - May 20, 2017 | Auction Team Breker In Germany
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2 Calculating Devices

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2 Calculating Devices
2 Calculating Devices
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Description
2 Calculating Devices
1) "Webb's Adder", 1868. Early American double-disc adder which was produced many decades but only patented in 1889. (2/2) – And: 2) "Otis King's Calculator", c. 1920. With original instruction sheets and cardboard case as well as scales No. 429 and 430 (2/2).

2 Rechengeräte
1) "Webb's Adder", 1868. Sehr früher amerikanischer Doppelscheiben-Addierer mit Zehnerübertragung, ab 1868 viele Jahrzehnte lang gebaut. Gemäß US-Patent vom 5. Nov. 1889. (2/2) – Und: 2) "Otis King's Calculator", um 1920. Logarithmische Taschenrechenwalze mit doppeltem Teleskop-Auszug, Skala-Nr. 429 und 430, Anleitung und Schachtel. (2/2)

Start Price: € 100

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2 Calculating Devices

Estimate €180 - €350
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Starting Price €100
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Item located in Koeln, de
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