YUAN: Mongol Khans, ca. 1230-1280, AE 2 cash (4.15g), H-19.7 var, derived from the Northern Song da guan tong bao, but the style of the calligraphy is more correct for this period, as is the casting style and weight, minor tooling in reverse field, Fine to VF, R, ex Jiùjinshan Collection.
Estimate: 200-300 USD