This coin is dated around 1346-1378 during the time of Charles I of Bohemia. It is 60% Copper, 32% Zinc, and 23 grams in weight. I am wondering around how much this coin is worth, as I'm trying to sell it.
I can only find references for a silver groschen. That leads me to believe, like dr3ex already said, that it is a copy. Therefore it doesn't have any "real" value IMO.