Televisions in the 1950s required high-voltage tubes to produce the colors, which were replaceable at the end of their lifespan. If your TV was not working correctly, you could call a TV repairman or remove the tube and bring it down to your local GE Dealer, and they would test it for you. This colorful die-cut window display would grab your attention with the GE service technician holding a larger-than-life Electronic Tube above his head. Each store had a machine that would quickly test a customer’s tube; if it was bad, they could quickly sell them a new one. The display is a new old stock piece with the original paper envelope included. Some outer edge wear is evident. It measures 28 inches tall once folded open and is 23.5 inches wide. 21250-WWT