Early twin fin

Here's an unbranded early 70s first generation twin fin from Alex's collection. I say first generation loosely as there was the odd twin fin existing as far back as the 40s , but '69 /'70 was when it started to seriously take off, although not at the huge scale of later in the decade. This one is 6'1 and pretty wide, looks similar in shape to Phil Jay boards of the time, and also the twin fins that Tris was making.
Tris Cokes, early 70s with one of his twin fins. photo courtesy of Tris.
Campbell brothers, 1970 with their first bonzer, 5'4 , and a 5'2 twin fin patterned after Terry Fitzgeralds boards.