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File:Vintage Casio Biolator Pocket LED Calculator, Model H-801, Made in Japan, Circa 1975 (9273200144).jpg - Wikipedia
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File:Vintage Kosmos I Biorhythm Calculator, Green Fluorescent Display, Made In Japan, Circa 1970s (15805473669).jpg - Wikimedia Commons
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Vintage Casio Biolater Electronic Calculator Set, Model H-801, Made in Japan, Set Includes Calculator, Booklet on "How to Live with Your Life Cycles", Charts an… | Pocket calculators, Calculator, Life cycles
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