Watch List notes:

TANG: Qing Feng, 649-683, AE cash (4.51g), H-14.100, qián feng quán bao, VF, R. This type was cast by the Emperor Gao Zong (649-83) in 666. In an attempt to overcome a shortage of copper, one of the qian feng coins was to be equivalent to ten old coins, although its weight of 2.4 zhu was the same as a one cash coin. This led to extensive forgery, and the coin was withdrawn after a year.

Estimate: 100- 150 USD