Regency TR-1
The first transistor radio sold to the public.
The Regency TR-1 came in November 1954 and used four transistors instead of radio valves. It was small enough to carry in a pocket and ran on a battery.
The radio sold around 150,000 units. It opened the way for the Japanese pocket radios that soon took over the market.
Materials: Plastic case, four transistors, battery
Manufacture: Made by Industrial Development Engineering Associates in Indianapolis with Texas Instruments from 1954.
The small plastic case that fits in a shirt pocket.
The rounded shell with two knobs.
The speaker grille on the front.