I've got one also. It's a 1965. It appears to be a soft ,light aluminim alloy. I'll see if I can find it and post a photo later. I may even have posted it here a few years ago. It's a FAKE.
I saw that episode. The claim was that he managed to spend a good ammount of them before being caught with a box full of the coins in his car. or something like that. Tried to find the info online, but I only came up with this: http://www.ccgtcc.com/~fantasy/fakes_body.html
And the show claimed that his counterfeits are still circulating in Las Vegas, because it would be a hassle to mint new coins and revamp the system.