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File:Vintage Sharp Electronic LCD Calculator, Model CT-550, Made in Japan, a Combination of a Clock, Stop Watch and Calculator in a Very Small Case, Circa 1977 (9330231960).jpg - Wikimedia Commons
File:Vintage Sharp Electronic LCD Calculator, Model CT-550, Made in Japan, a Combination of a Clock, Stop Watch and Calculator in a Very Small Case, Circa 1977 (9327429649).jpg - Wikimedia Commons
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