600 Baht - Rama IX Golden Jubilee

Issued to mark Bhumibol Adulyadej's 50th year on the throne, this coin commemorates what was, at the time of striking, the longest reign of any sitting monarch in the world. The Golden Jubilee celebrations in June 1996 drew heads of state from across Asia and Europe to Bangkok, and the commemorative coin program was among the most elaborate Thailand had produced to that point.

The 600 baht face value — far exceeding any circulation denomination — places this squarely as a collector issue with no pretense of ordinary use.