1971's Smallest Battery-Powered Calculator: Dictaphone 1680

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Taking a look at the Sanyo ICC-82D, aka the Dictaphone 1680. The smallest portable electronic calculator with built-in display on the market in 1971! And one of the first hand-holdable battery powered calculators, period. It wasn't cheap either, costing $495 in '71 – roughly $3500 with inflation!

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