This fin was made for the Bluebird in 1973. It's a rigid, powerful little fin from the Hawaiian school of design lead by Dick Brewer, Gerry Lopez and in Australia Terry Fitzgerald. It loves high-speed point surfing and down-the-line flow, emanating from the speedy surfboard templates of the mid 70s. The smaller neutral fin encourages the board to roll onto either rail allowing the straighter template to become the driving element.