RCA Compatible Color (NTSC System)

In late 1953, the FCC adopted the RCA compatible system. The first color television sets for this system were sold in 1954. They used a 15 inch screen. Later that year, 19 inch sets were made, and by 1955 all sets were made with  a 21 inch picture tube. Several manufacturers made 15 and 19 inch sets, most in very small quantities.