Coin

Large sized circulating coin

Round coin with a four-sided hole in the centre, and a rim around the outer edge and the centre hole. The obverse has four characters, and the reverse has two characters. Daoguang tongbao (top-bottom-right-left) in Chinese characters are on the obverse; boo fu left-right (mintmark) in Manchu are on the reverse. Extra metal is in the centre hole; file marks; rim pits.