Watch List notes:

China, Northern Zhou (557-581 AD), ? ? Bu Quan and ? ? Wu Zhu (2), round cash, with square hole, Wu Zhu with full inner rims, c. 561-562 AD, 25-26 mm, 3.00-3.77g (H. 10.22 var.; 13.29). Very Fine. Wu Zhu variety unlisted in Hartill. (2)