Coin Item Number: Edz2423 from the MOA: University of British Columbia
Coin, round, with a four-sided hole at the centre, a rim around the outer edge and a centre hole. The obverse has four characters, and there is a nail mark on the reverse. Hongwu tongbao (top-bottom-right-left) in Chinese characters on obverse; nail mark bottom-right diagonally upwards to right on reverse. Centre hole partly rounded
Normal sized circulating coin. Issue of first Ming emperor.