File:Unisonic 21 Blackjack Computer Console With Calculator, Model 21-D3 (aka Model D-3), "Play and Enjoy Unsonic 21 With Jimmy the Greek", Made in Taiwan, Copyright 1977 (Electronic Game).jpg - Wikimedia Commons
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File:Tandy Blackjack calculator, front, power on in Game mode (23289985093).jpg - Wikimedia Commons
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