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File:Vintage Royal 91S Electronic Pocket Calculator (aka UA122), Green Fluorescent Display, Made In Japan, Circa 1976 (15248080616).jpg - Wikimedia Commons
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Desktop Calculator 12 Digit with Large LCD Display and Sensitive Button, Solar and Battery Dual Power, Standard Function for Office, Home, School, CD-2786 (Purple): Amazon.co.uk: Stationery & Office Supplies
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