If you are in Europe and intend only selling them outside the US, then no, you would be breaking no laws, unless your country is much stricter than other countries about counterfeiting foreign coins.
If, however, you intend to export them to the United states, then be aware that American law requires the stamping of COPY as proscribed above on any imported non-genuine coin. Neither the purpose the coins are made for nor the intent of the importer or purchaser are relevant.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis