If the coin is indeed genuine, this is a coin of the Qing Dynasty minted during or shortly after the reign of the Shunzhi Emperor (r. 1643-1661). The obverse, in Chinese, reads (going top-bottom-right-left) 順治通寶 Shunzhi tongbao ('Shunzhi currency') which gives away the imperial reign. The reverse, in Manchu, read right-left, is probably ᠪᠣᠣ ᠴᡳᠣᠸᠠᠨ boo ciowan – 'money of the fountain', meaning it was issued by the Board of Revenue in Beijing. This sounds quite arcane, but the Board of Revenue was nicknamed (in Chinese) the 寶泉 baoquan ('Fountain of Treasure'), and Manchu ᠴᡳᠣᠸᠠᠨ ciowan is a transliteration of Mandarin 泉 quan. Coins minted under provincial auspices had their own distinct mint marks.