This is a Vintage Zenith Transoceanic G500 Tube Radio, with a 5G40 Chassis. Often called a Transition Model, the G500 was made for around 18 months from 1949 to 1951. This one has 343951 printed on the speaker, which we interpret as Zenith, 1949, 51st week.
It was serviced in 1962 by A Karian of Upper Darby, PA. In fair cosmetic condition with scuffs, scratches and marks. The Tolex is worn through in places and is lifting in a couple of spots - please see pics.