Ming's Old Coins Founded in Nganjuk

At least 1.749 old coins founded by Manirin (50), a red onion farmer in Balonggebang Village, Gondang, Nganjuk Regency, East Java. These coins estimated as Chinese remains. The size of them is bigger than the 500 rupiahs coin. In the center of it, there is a square hole and 4 chinese characters. Each coin has different characters.