Sperry 663
By ClausB
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Around 1974 my dad bought me my first electronic calculator. What joy! It was a 663 which looks just like the picture but without the 0 switch. Only 4 functions but up to 12 digit answers - sometimes. The keyboard has a really nice feel. I later gave it to my sister-in-law and never saw it again. In 2010 I got another one off eBay.
Metatechnical Cabinet
Vintage Calculators Web Museum
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