Surfboard design introduced in 1972 by Malcolm and Duncan Campbell of Oxnard, California. The bonzer was one of the first boards to use three fins: a pair of toed-in, keel-like side fins, located in front of a standard center fin. The board also had two parallel concaves down the bottom rear half of the board.

The bonzer (period Australian slang for "bitchin'") was a hot surf media topic in 1973 and 1974, and pro surfers Ian Cairns and Jeff Hakman were among the design's proponents, saying t...