China, 25–220 AD., Eastern Han dynasty, Wu Zhu, Hartill 10.6 ff var.

China, Eastern dynasty (25–220 AD.), ca. 25–220 AD.,
Wu Zhu (5 Zhu) (24,5 mm / 2,08 g), cast, square center hole,
Obv.: 五 - 铢 / • • • , Wu - Zhu / ••• (right - left / below center hole), 3 (or more?) stars or dots below center hole, no rim above the hole.
Rev.: plain (square center hole).
cf. similar coins on http://primaltrek.com/charmcoins.html#wu_zhu_numbers ; cf. Hartill 10.6 / 10.19 / 10.37 .