This Raytheon T-100 has a serial number of 33465. Stamped inside the battery compartment are the following color combination’s that the radio came in; black-yellow, ivory-yellow, black-red, ivory-red, and ivory-gray. Each color combination is denoted in the model number by the last digit.
“Made under licenses of RCA and Hazeltine and other patents” is also stamped inside the battery compartment. During the early 1950’s RCA and Hazeltine Labs owned or controlled most consumer electronics patents and a manufacturer had to seek license and technical support from these companies.
