It's not my coin but one guy on our Polish forum claimed to found this coin in the ground. It's a seated Liberty dollar, but it has "O" on it, so it seems it's from the New Orleans mint. But it also seems that such dollar coins were minted there in 1846, 1850, 1859 and 1860 only. Is it possible that it's a geniuine coin? Or is it a counterfeit one? Unfortunately on our Polish forum we don't have American coin specialists, so I decided to ask here.