From 1966: Radio Advertising Representatives logo by Tom Woodward

Time once again to spotlight a forgotten '60s logo! Radio Advertising Representatives was the radio advertising arm of Westinghouse Broadcasting, one of the major radio and TV station owners in golden age of over-the-air TV. It was known as AM Radio Sales Co. until 1966 when the name was changed.

With the namechange came a new logo, developed by Tom Woodward who at the time had a studio on La Cienega Boulevard in Los Angeles. The new logo was launched through ads in trade and mass press on October 3, 1966.

The RAR name survived until around 1982/1983 when it was changed to Group W Radio Sales. Group W itself merged into CBS in 1994.

RAR-branded radio planner. From Wikipedia, by Kevin Killon (CC-BY-SA).