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BobThe reason so many Zeenuts appear in worn condition is that they were often used in flipping games when they were bounced off walls and pavements in a game to see who could get closest with the prize being the other guy's Zeenut. This is why you see Zeenuts with corners trimmed and waxed, etc. This was what was related to me by Mark Macrae who knows more about the Zs than anyone alive.