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Unusual Vintage Hexadecimal converter: Smith Product Research, 1985. NOS $9.95 USD Sold on: 2014-Jan-04 Marketplace: eBay ![]() 1 Treasure 0 Trash ![]() 100%This is an unusual, vintage item. It's a Hexadecimal arithmetic converter, made from heavy cardboard, with pivoted wheels and windows to show the settings and results. It was made in 1985 by Smith Pro... ![]() More Relevance Historical Items
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