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Regency began manufacturing the TR-1 on October 25, 1954.
The Regency Division of I.D.E.A announced the TR-1 on October 18, 1954, and put it on sale in November 1954.
The Regency TR-1 featured four germanium transistors operating on a 22.5-volt battery that provided over twenty hours of life. The unit weighed eleven ounces and cost $49.95.
In August 1955, Tokyo Tsushin Kogyo released the Sony TR-55, Japan's first commercially produced transistor radio.
The first Sony imported to the USA was TR-63 in 1957. It was a worldwide commercial success.
University of Arizona professor Michael Brian Schiffer, PhD, says, "Sony was not first, but its transistor radio was the most successful".