Hello and welcome.

Sorry, but this is neither gold nor a coin. It's a brass jeton or rechenpfennig, a kind of token originally made for use on a counting-board, a mediaeval chequerboard that was used kind of like an abacus to help people do mathematics back when everybody still wrote numbers using Roman numerals. This is a rose and orb type of the style commonly made in Nuremberg, Germany, probably from the 1400s or 1500s judging by the style of lettering. See the top token on
this page for a very similar example.
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