Watch List notes:

NORTHERN ZHOU: Anonymous, 557-581, AE cash (4.13g), H-13.30, wu xing da bu, EF, ex Jiùjinshan Collection. The legend translates as "the large coin of the five elements [metal, wood, water, fire, and earth]", issued in 574 by Emperor Wu. They were intended to be worth ten bu quan coins, but illegal coining soon produced specimens of a reduced weight and the authorities banned the use of this coin in 576.

Estimate: 75-100 USD