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File:Vintage Rockwell 24K (the 24K) Electronic Handheld Calculator With VFD (Vacuum Fluorescent Display), Made In Taiwan, Circa 1975 (28963046973).jpg - Wikimedia Commons
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File:Vintage APF M74 Pocket LED Calculator, Made in Singapore, Circa 1979 (9304298676).jpg - Wikimedia Commons
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File:Vintage Kovac Pocket Mini LED Electronic Calculator, Model P-80, Made in Japan, Circa 1976 (8728727898).jpg - Wikimedia Commons
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