2 Mun Kyong Su

The 2 Mun denominations of the Joseon dynasty were cast rather than struck, produced at numerous government foundries and military offices simultaneously — a decentralized system that makes attribution to a specific mint dependent almost entirely on the identifying characters cast into the coin itself. KM#909 was issued under King Yeongjo, whose 52-year reign was one of the longest in Joseon history and coincided with ongoing attempts to rationalize a chaotic currency system that had been plagued since the 17th century by chronic shortages and regional resistance to cash coinage.

The foundry source notation cast on the reverse edge remains the primary tool for specialists distinguishing varieties within this type.