SONY TR-55 SCH Service Manual download, schematics, eeprom, repair info for electronics experts
Sony TR-55 Transistor Radio - YouTube
See all vintage SONY transistor radio collectibles book TR-55 TR-63 ICR-100 TR-8 | eBay
WCSA - On This Day - August 07, 2018 - Tokyo Telecommunications Engineering, the precursor to Sony, begins selling its first transistor radios in Japan in 1955 - WCSA.WORLD
1955 Sony's first transistor radio TR55 – Alexander Atkinson
SONY TR-55 first Sony transistor radio, first product named 'Sony' - at collectornet.net - YouTube
Sony Group Portal - Product & Technology Milestones−Radio