![File:Vintage Advertising For The Zenith Royal 500 Transistor Radio In A Koski TV Store Ad In The Missoulian Newspaper (Missoula, Montana), December 18, 1955 (49413822728).jpg - Wikimedia Commons File:Vintage Advertising For The Zenith Royal 500 Transistor Radio In A Koski TV Store Ad In The Missoulian Newspaper (Missoula, Montana), December 18, 1955 (49413822728).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/f/f0/Vintage_Advertising_For_The_Zenith_Royal_500_Transistor_Radio_In_A_Koski_TV_Store_Ad_In_The_Missoulian_Newspaper_%28Missoula%2C_Montana%29%2C_December_18%2C_1955_%2849413822728%29.jpg)
File:Vintage Advertising For The Zenith Royal 500 Transistor Radio In A Koski TV Store Ad In The Missoulian Newspaper (Missoula, Montana), December 18, 1955 (49413822728).jpg - Wikimedia Commons
![Vintage Zenith Deluxe Royal 500 Transistor Radio (Model 500H), AM Band Only, 8 Transistors, Made In USA, Circa 1961 | Transistor radio vintage, Retro radios, Vintage radio Vintage Zenith Deluxe Royal 500 Transistor Radio (Model 500H), AM Band Only, 8 Transistors, Made In USA, Circa 1961 | Transistor radio vintage, Retro radios, Vintage radio](https://i.pinimg.com/736x/86/2b/f4/862bf4f45cfbe98fa9243c85005ad251--transistor-radio-radios.jpg)
Vintage Zenith Deluxe Royal 500 Transistor Radio (Model 500H), AM Band Only, 8 Transistors, Made In USA, Circa 1961 | Transistor radio vintage, Retro radios, Vintage radio
![File:Vintage Zenith Royal 500 Transistor Radio, Model 500H, Chassis 8HT40Z2, AM Band, 8 Transistors, Measures 4 x 6 x 1.75 Inches, Made In USA, Circa 1961 (49498833733).jpg - Wikimedia Commons File:Vintage Zenith Royal 500 Transistor Radio, Model 500H, Chassis 8HT40Z2, AM Band, 8 Transistors, Measures 4 x 6 x 1.75 Inches, Made In USA, Circa 1961 (49498833733).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/8/8b/Vintage_Zenith_Royal_500_Transistor_Radio%2C_Model_500H%2C_Chassis_8HT40Z2%2C_AM_Band%2C_8_Transistors%2C_Measures_4_x_6_x_1.75_Inches%2C_Made_In_USA%2C_Circa_1961_%2849498833733%29.jpg)