c.1958 Sony TR-75
Portable radio, thermoplastic cabinet
8 x 4 3/8 x 1 3/4 inches / 202 x 110 x 45 mm
Six transistors (Sony), superheterodyne circuit
Three 1.5-volt "C" cells
Manufactured by Sony Corp., Japan
Even with the reverse-painted tuning area, this is a pretty plain-looking radio to have come from Sony. And given how commonly found this model is, I really have to question that smallish total production figure of 37,000 that's been bandied about on web sites for years, including my own M31 site.