Unisonic 21-P1 Handheld Electronic Calculator and Electronic Game | National Museum of American History
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Amazon.com: Tandy Corporation Radio Shack Calculadora electrónica de blackjack llevó el modelo de juego de mano # ec-21 completo, con manual, con cubierta y calculadora : Productos de Oficina
![File:Unisonic 21 Blackjack Computer Console With Calculator, with package, Model 21-D3 (aka Model D-3), VFD, "Play and Enjoy Unsonic 21 With Jimmy the Greek", Made in Taiwan, Copyright 1977 (Electronic Game).jpg - File:Unisonic 21 Blackjack Computer Console With Calculator, with package, Model 21-D3 (aka Model D-3), VFD, "Play and Enjoy Unsonic 21 With Jimmy the Greek", Made in Taiwan, Copyright 1977 (Electronic Game).jpg -](https://upload.wikimedia.org/wikipedia/commons/d/dd/Unisonic_21_Blackjack_Computer_Console_With_Calculator%2C_with_package%2C_Model_21-D3_%28aka_Model_D-3%29%2C_VFD%2C_%22Play_and_Enjoy_Unsonic_21_With_Jimmy_the_Greek%22%2C_Made_in_Taiwan%2C_Copyright_1977_%28Electronic_Game%29.jpg)