Coin Item Number: Edz2702 from the MOA: University of British Columbia
Round, 4 sided hole in centre, rim around outer edge and centre hole, obverse 4 characters, no writing on reverse. Yongli tongbao (top-bottom-right-left) in seal script. Rim pits, flaws; rough surfaces; small rims, large characters, large bottom part of bottom character.
Large sized circulating coin value 2. Made in Japan for Zheng Chenggong, with titles of Yongli. Zheng was subject to Yongli only when it suited Zheng's purposes; Zheng was a pirate-merchant.