Coin

Large sized circulating coin value 2. Made in Japan for Zheng Chenggong, with titles of Yongli. Zheng was only a subject of Yongli when it suited Zheng's purposes; Zheng was a pirate-merchant.

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. File marks; rim depressions, pits; thick outer rim, smaller characters, large bottom part of bottom character; thick reverse rims.