Qianlong Tongbao Chinese Cash Coin (Qing Dynasty)

This is a circular brass or bronze alloy 'cash' coin from the Qing Dynasty, featuring the characteristic square central hole used for stringing coins together. The obverse (shown) displays four Chinese characters: 'Qian' (top), 'Long' (bottom), 'Tong' (right), and 'Bao' (left), identifying it as currency minted during the reign of the Qianlong Emperor (1735–1796). The item measures approximately 22-25mm in diameter. The metal exhibits a dark, aged patina with a brownish-gold hue and visible oxidation in the recessed areas. The strike of the characters is moderately sharp, though there is a circular indentation or manufacturing mark running across the characters on the left side, which may indicate a specific minting process or later surface wear. The rim is flat and relatively thick compared to modern coins. Regarding condition, there are minor surface scratches, edge nicks, and accumulated dirt or verdigris typical for an object of this age. On the reverse (not visible), one would expect to find Manchu script indicating the specific board of minting, such as the Board of Revenue or the Board of Works. The craftsmanship reflects the standardized casting techniques of the 18th-century Chinese imperial mints.