Huo Quan cash of Wang Mang (9-23 AD), half-star on the bottom, Empire of China - Hartill #9.49
Size and weight: 20 mm, 1.21 grams, bronze.

  14-23 AD- Xin  dynasty. Two large Chinese characters Huo Quan ("sping of goods"), with the protruding stroke on top of Quan, without the rim around the central hole but with a half-star on below the hole on obverse, raised outside rim. Cacting holes at 6 o'clock / Blank. Hartill #9.49.
 

This coin is guaranteed to be authentic.

Stock# chi257