Watch List notes:

China, Northern Zhou (557-581 AD), ? ? ? ? Wu Xing Da Bu, round cash, with square hole, c. 574 AD, 27 mm, 4.12g (H. 13.30; FD 640; S. 246). Very Fine. Known as the Large Coin of Five Elements (metal, wood, fire, water and earth), issued by Emperor Wu. Due to illegal coining it was banned in 576 AD.