But we think it is really a 6G601 which is a proper Zenith model number. According to [Jeff], 225,350 of these radios were made, and you can see that it closes up like a suitcase.

Q. I bought this Royal 500 radio for $60 in 1951. What is it worth now? A. Your particular Zenith (500B) was the second Royal model and was produced after 1955. It was a very expensive radio ...

The 1938 Zenith radio also received shortwave and police ban and a 1940s Sparton radio has a port for TV audio that can be used today to plug to an iPod.