Legality could be an issue. More important for C&V purposes, wouldn't the coin have to be period correct? Dan, I think I have an early 70's 5p that would do you well, but for your bikes, Neal, I think we'll need something with a portrait of King George VI on it....
now i'm gonna have go ask my brit buddy if he's got any spare change
cool idea!
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--Don't Panic.