My best guess would be "stage money" or "prop money", for a theatre - something designed to look coin-like from a distance, but not realistically coin-like enough to get the theatre in trouble for counterfeiting if any escaped to the general public.
Second-best guess: This one appears to have been looped, for jewellery - so perhaps it was a made-for-jewellery "pirate coin" replica; though those generally make a better effort at trying to look authentic.
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