I have seen what appeared to be old coins. On closer scrutiny it out to be a "snap together" coin. Someone had taken opposite sides of two of the same coins, and fitted them together. It appeared to be a normal coin, but it had a "secret compartment" between the two halves. There is, what looks like a seam, on the shoulder of the edge. I was wondering if anyone else saw that, and if that is something common to this type of coin.