c.1961 Zenith Royal 50K
Shirt pocket radio, thermoplastic cabinet
4 7/16 x 2 3/4 x 1 1/4 inches / 113 x 70 x 32 mm
Six transistors (Zenith, 121-145, 2x 121-151, 121-152, 121-153, 121-154)
Two 1.5-volt AA cells
Manufactured by Zenith Radio Corp.; Chicago, Illinois
Collector Gary Ball's superb and thorough Zenith transistor radio web site, Gary's Radios, gives the Zenith 50K as having an initial production date of late-1961 — that seems far more feasible than the 1963 dates found in a number of other sources. Some of the component codes on the example shown here indicate that this Royal 50K was produced into 1962, which would be no surprise at all for a "1961" radio.