Old Zenith radios can be age-dated using these identifiers: Serial number - This can be found on Zenith radios on a hard tag riveted to the back of the radio; the serial number is a letter followed by five or six digits and is found on models from 1927 to 1949. Chassis number - On early Zenith radios, this number identified the type of chassis.These are fantastic radios made by Zenith..
The Zenith model 5S319 (5-S-319) from 1939 is a small tabletop 5-tube AC superhet circuit radio. It receives the standard broadcast band and one short wave band, and has "automatic" or push-button tuning. The radio had seen some servicing and restoration in the past.. Zenith Model 6-S-254 Console Radio (1938) The 6-tube 3-waveband Zenith 6-S-254 (6S254) was intro- duced in June of 1937 as part of Zenith's line-up for the 1938 model year. It initially sold for $69.95 in the East, but in early August Zenith , along with other manufacturers, announced across the board price increases.