Watch List notes:

Foreign Coins, Thailand, Rama IV, bullet coinage, gold ¼ baht (salung), Mongkut mark, struck during the reign of Rama V (1868-1910), wt. 4.33gms. (KM.C165; Fr.12), extremely fine, rare
As is common in Thailand, this piece was once mounted onto a button, resulting in the increased weight.
(450-500 GBP)