Casio Mini Card LC-78 Handheld Electronic Calculator | National Museum of American History
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File:Vintage Casio-Mini Electronic Pocket Calculator, Model CM-602, 6 Digit Fluorescent Display Made In Japan, Circa 1973 (14184440031).jpg - Wikimedia Commons
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Calculators | Casio USA
File:Vintage Casio Mini Electronic Pocket Calculator, Model CM-605, 6 Digit Bue VFD, Made in Japan, Circa 1974 (11972293654).jpg - Wikimedia Commons
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