"Consul" The Educated Monkey, simple multiplication device patented in Britain 1916 and 1918, tin
Consul' the Educated Monkey. A mathematical toy calculator patented by William Robertson in 1916 and made by the Educational Novelty Company of Dayton, Ohio, USA. When each of the monkey's feet are moved to point at two numbers, the monkey's hands move to indicate the product.
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- Auction Team Koln
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