Coin Item Number: Edz2560 from the MOA: University of British Columbia
Round, 4 sided hole in centre, rim around outer edge and centre hole, obverse 4 characters, 1 character on reverse. Chongzhen tongbao (top-bottom-right-left) in Chinese characters on obverse; jia top (cyclical date) in Chinese characters on reverse. Rim pits; depressed area at outer rim top; file marks; centre hole not square; reverse fields rough.
Normal sized circulating coin