1017-1022CE, Northern Song Dynasty, Tian Xi Tong Bao (1 Cash)

Obverse

Four Chinese ideograms read clockwise (in Regular script).

Script: Chinese (traditional, regular script)

Lettering:
　天
寶　禧
　通

Translation:
Tian Xi Tong Bao
Tianxi (4th era of Zhenzong, 1017-1021) / Universal currency

Reverse

Blank (uniface).

Weight: 4.21g

Diameter: 24.5mm

Harthill #16.68