Hey, so
Elianite might know. He's been writing a book on all the physical crypto coins in existence. I'd bet money he has information on who these people use to mint there coins. (Here's a link to his thread for the book:
https://bitcointalk.org/index.php?topic=1022071.0)
Do you have a design yet? A lot of the coins look
very similar and almost all have a striking resemblance to the original: Casascius. I think it would be cool if a completely different design was created, perhaps drawing on some of the unique features of older fiat coins (e.g., one with a hole in the middle, etc.).
Good luck to you, I look forward to seeing your coin once it is complete!
