One of the most popular of the early Southern Californian surf bands, the Challengers were formed by drummer Richard Delvy after he left the Bel-Airs, who had recorded one of the very first surf singles, Mr. Moto. Their debut LP, Surfbeat (early 1963), was one of the very first all-instrumental surf albums and sold 200,000 copies, an astronomical number for a regional act. Recording several albums over the next couple of years, most of their repertoire consisted of covers of popular rock and surf tunes; undeniably exciting at the time, their lack of originality can make their work generic to wade through. The moody K-39, also available on surf compilations, is their most famous cut.