This transistor radio was made in black, gray, beige, cream or green plastic. The earliest newspaper ads I could find for this radio date to 1960.
PANASONIC RADIO
Vintage Sony Transistor Radio, Model TR-84, AM Band, 8 Tra…
Retekess V117 Portable Radio AM FM, Shortwave Radio with Clear Dial, Transistor Radio with Best Reception for Seniors (Black) : Electronics
Vintage Sony TR-84 8 Transistor Radio Super Sensitivity
Sony - Wikipedia
BC-R60 AM FM Radio Portable Pocket Radio Telescopic Antenna Mini Radio Music Player Built-in Speaker for House & Outdoor - AliExpress
Vintage Sony TR-84 Super Sensitivity 8 Transistor Radio - 1959 era Sony, Japan
Transistor Radios Around the World
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Mint Vintage 1959 Sony TR-84 Super Sensitive 8 Transistor Radio
MiniDisc - An Appreciation
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Vintage Sony TR-84 Transistor 8 Radio Super Sensitivity WORKS!! (PL185)
SONY Transistor 8 Vintage radio, Antique radio, Transistor radio