WJZ in Newark, 1922

The WJZ callsign was first used on what is now WABC in New York City. The original Westinghouse Electric Corporation, whose broadcasting division is a predecessor to the current broadcasting unit of ViacomCBS, launched WJZ in 1921, and was located originally in Newark, New Jersey. WJZ was sold in 1923 to the Radio Corporation of America, which moved its operations to New York, and on January 1, 1927, WJZ became the flagship station for the NBC Blue Network.

Image from Austin C. Lescarboura, “Radio for Everybody,” Scientific American 126 (March 1922): 166-168, 220.