For king John this design, with Mary and Child on one side and St Ladislaus on the other, was only used on gold coins I believe. The gold coin is usually known as a "ducat" or "dukat".
This one on CoinArchives is the same type but dated 1540 and sold for 500 euros; I don't think the actual date on the coin makes any difference to the price of gold coins from this time period.
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