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.
VINTAGE SONY TR-817 Super Sensitive Transistor Radio 1960's Leather Case Works $82.00 - PicClick
Poptronics-1975-01
radiojayallen Jay's Radio Reviews, Comparisons & Restorations
Tested - works great, with case in near mint condition , please see photos , a few minor scratches on the front metal panel , Takes 3 'C' batteries
Mint Vintage 1959 Sony TR-84 Super Sensitive 8 Transistor Radio
Panasonic RF-2200
FOR REPAIR Sony TR-84 Transistor Radio – Milton Wares
radiojayallen Jay's Radio Reviews, Comparisons & Restorations
Vintage Sony TR-84 Super Sensitivity 8 Transistor Radio - 1959 era Sony, Japan
File:Vintage Sony Transistor Radio, Model 3R-68, AM Band, 8 Transistors, Slide Rule Tuning, Black Case, Measures 1-1 8 W x 4 H x 2-5 8 Inches Deep, Weighs 7.4 Ounces, Made In Japan, Circa 1971 (32579217878).jpg - Wikimedia Commons
Transistor Radio