50 Baht - Rama IX National Museum

Issued to commemorate the centennial of the National Museum in Bangkok, this coin marks an institution founded in 1874 when Rama V opened the royal collections to the public — a deliberate modernizing gesture modeled on European state museums. The billon composition, a relatively low silver alloy, reflects Thailand's cautious approach to commemorative coinage in this period, balancing collector appeal against the cost of silver at a time of rising global commodity prices.