Xuan He Tong Bao 1-cash in seal script
The thin characters with fine cursive strokes. Also called "Mei Zhi" in Chinese. Cast under rule of emperor Hui Zong of Northern Song dynasty. 24mm - 15 USD @ dong_hua_zhai
Ref. Fugo Senshi 1059
If you collect Xuan He coins, you will be amazed by the number of variants exist!