Native american (Sitka Alaska) Tlingit leather war dress plated with Chinese coins. The Tlingit received Chinese coins in trade from Boston sea merchants in exchange for sea otter pelts.  Chinese coins were used as currency during the Qing dynasty. Most were minted in the Shunzhi (1644–62), Kangxi (1662–1723), and Yongzheng (1723–36) eras, as identified by their reign marks.