2 Mun Hun; Infinite time

The "infinite time" (무한, 無限) designation on Joseon cash coins refers not to a mystical concept but to a bureaucratic one — it distinguished issues authorized for indefinite circulation from coins struck under temporary minting campaigns with fixed end dates. The Board of Revenue began casting this series in 1752 partly to address chronic copper shortages that had plagued earlier mun issues, with brass substituted as a practical compromise. Cast rather than struck, each piece was produced in sand molds, which accounts for the surface texture variation collectors encounter across the type.