File:Epoch Digit-Com 9 Electronic Baseball, Model No. 7960, Takes 4 AA Batteries, Made in Japan, Copyright 1979 (Handheld Electronic Game).jpg - Wikimedia Commons
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Vanderbilt used an electronic wristband system for calling pitches
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ELECTRONIC RETRO SPORTS GAME ASSORTMENT: BASEBALL ELECTRONIC GAMES - GTIN/EAN/UPC 885561095074 - Product Details - Cosmos
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The Handheld Museum: A tribute to the early history of handheld gaming | TechRepublic
Radio Shack Electronic Handheld Two Player Professional League Baseball 1 & 2 for sale online | eBay
File:Tandy Electronic 2-Player Baseball, Cat. No. 60-2157, Made In Hong Kong, Circa 1981 (LED Electronic Handheld Game).jpg - Wikimedia Commons
LGR - Tiger Electronic Baseball Review - YouTube
Handheld video game:Mattel Electronics Baseball - Mattel, Inc. — Google Arts & Culture
:strip_icc()/pic131289.jpg "Electric Baseball | Board Game | BoardGameGeek")
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Electronic Baseball from Basic Fun - YouTube
File:Mattel Baseball, Model 2942-0320, Made in Hong Kong, Copyright 1978 (LED Handheld Electronic Game).jpg - Wikimedia Commons
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Mattel Electronic Handheld Classic Baseball Game, 2001 - A Grand Slam! - YouTube
File:Coleco Head To Head Baseball, Model 2180, Made In Hong Kong, Circa 1982 (Electronic Handheld Game).jpg - Wikimedia Commons
Sign of times: MLB gives OK to electronic pitch calling
Handheld video game:Coleco Head to Head Electronic Baseball - Coleco — Google Arts & Culture
File:Epoch Digit-Com 9 Electronic Baseball, Made in Japan, Copyright 1979 (LED Handheld Electronic Game).jpg - Wikimedia Commons
Entex Baseball In Electronic Games for sale | eBay
Amazon.com: Mattel Classic Baseball Game : Toys & Games
