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File:Vintage Regency TR-1 Transistor Radio, Serial Number 16599, AM Band, Ivory Cabinet, 4 Transistors, Made In USA, Circa 1954 (33172890345).jpg - Wikimedia Commons
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Regency TR-1 - World's first transistor radio, with case, early example 1954 - collectornet.net - YouTube
![File:A Factory Repaired Regency TR-1 Transistor Radio With A TR-1G Case, Repair Label Dated July 30, 1962 (22320397563).jpg - Wikimedia Commons File:A Factory Repaired Regency TR-1 Transistor Radio With A TR-1G Case, Repair Label Dated July 30, 1962 (22320397563).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/7/72/A_Factory_Repaired_Regency_TR-1_Transistor_Radio_With_A_TR-1G_Case%2C_Repair_Label_Dated_July_30%2C_1962_%2822320397563%29.jpg/1200px-A_Factory_Repaired_Regency_TR-1_Transistor_Radio_With_A_TR-1G_Case%2C_Repair_Label_Dated_July_30%2C_1962_%2822320397563%29.jpg)
File:A Factory Repaired Regency TR-1 Transistor Radio With A TR-1G Case, Repair Label Dated July 30, 1962 (22320397563).jpg - Wikimedia Commons
![REGENCY TR-1 THE FIRST TRANSISTOR RADIO SM Service Manual download, schematics, eeprom, repair info for electronics experts REGENCY TR-1 THE FIRST TRANSISTOR RADIO SM Service Manual download, schematics, eeprom, repair info for electronics experts](https://elektrotanya.com/PREVIEWS/63463243/23432455/regency/regency_tr-1_the_first_transistor_radio_sm.pdf_1.png)