Coin Item Number: Edz2869 from the MOA: University of British Columbia
Round, 4-sided hole in centre, rims around outer edge and centre hole, obverse 4 characters, reverse character, inverted crescent. Kaiyuan tongbao (top-bottom-right-left) in orthodox Chinese characters on obverse; jing (top), mintmark, Chinese character, inverted crescent (bottom) on reverse. Inner hole off-centre.
Normal sized circulating coin
Reverse mould misaligned