RARE Antique 1890's CALCULIGRAPHE Calculator Calculating CIRCLE Slide Rule w/BOX $305.00 USD Sold on: 2013-Apr-01 Marketplace: eBay ![]() 9 Treasure 0 Trash ![]() ![]() This is a Calculigraphe, invented by Henri Chatelain of France, circa 1890. It is essentially a calculating circle (slide rule). The instructions begin "The Calculating Circle is an instrument by mean... ![]() More Relevance Historical Items
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