The Treasury Department series was issued to commemorate the centennial of Thailand's Treasury Department, founded under Rama V as part of his sweeping modernization of Siamese state finances. By Rama IX's reign, such institutional commemoratives had become a reliable vehicle for the Thai mint — functional currency with a specific occasion attached, struck in quantity but rarely saved in circulation.
The Treasury Department series was issued to commemorate the centennial of Thailand's Treasury Department, founded under Rama V as part of his sweeping modernization of Siamese state finances. By Rama IX's reign, such institutional commemoratives had become a reliable vehicle for the Thai mint — functional currency with a specific occasion attached, struck in quantity but rarely saved in circulation.