Watch List notes:

NORTHERN ZHOU: Anonymous, 557-581, AE cash (4.37g), H-13.32, seal script, yong tong wan guo (everlasting circulation in ten thousand kingdoms), light planchet porosity, tiny flan crack, EF. Issued in 579 AD by Emperor Xuan. Its nominal weight was 12 zhu, and the coin was meant to be equivalent to ten wu xing coins and written in the Yu Zhu (jade chopstick) style of calligraphy which is greatly admired.

Estimate: 200-300 USD