Hi Rob,
Been busy lately, have only now spotted your post.
Hersh is right, they are castings for the over-centre catches (side clasps) but Robbie doesn't think they're 100% original, but could be.
Never mind a surf board, they'll make brilliant coat hooks -'Hey come and have a look at my genuine GT40 coat hook.'
How's that for one upmanship?
In a larger size it would make an ideal sand paper grip. The ergonomics are about right!
Robbie cut his hand last night in his workshop at home and cut an artery. Blood everywhere, off to the nearby clinic for stitches. He's now a cut above the rest!
Greetings,
Andre 40