Zenith Royal 500B, 1957
"French Beige", Chassis 7ZT40Z1, has a black dot on left center of battery compartment label. The 2nd version of the first transistor portable made by Zenith in the USA. 7 transistors (121-16, 121-15, 121-17, 121-17, 121-18, 121-19, 121-19), "UNBREAKABLE NYLON" case.