100 Baht - Rama IX Millennium - Year of the Dragon

Issued to mark the turn of the millennium coinciding with a Thai lunar Year of the Dragon, this piece was part of a broader commemorative program under Bhumibol Adulyadej, whose reign of over seven decades made him the world's longest-serving head of state at the time of his death in 2016. Thai royal commemoratives from this period were produced in strictly controlled mintages by the Royal Thai Mint and were rarely released through general circulation channels, moving instead through the Government Savings Bank and authorized dealers.

The .9999 fineness is notably purer than the .900 gold standard common to most world coinage of the twentieth century.