Four Chinese characters (seal script with a round Huang, small characters, reading up, down, right, left) Huang Song Tong Bao (dynastic title "Imperial Song") / Blank. 21.5mm, 2.62 grams. Original issued in 1039-1054, this imitation is probably much later - 15th-16th century?

Rare.

This coin is unconditionally guaranteed to be authentic.