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Rare Vintage Casio fx-451M Solar Power Scientific Calculator Works Great (C10B1) #Casio | Calculator, Old calculator, Scientific calculator
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World's first pocket calculator goes up for auction: 'Exceptionally rare' 17th century machine made of wood could fetch £100,000 | Daily Mail Online
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Casio Japan Antique Rare Vintage Second Hand Pic-1 Printing Calculator (FR- 1211) : Amazon.in: Office Products
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