2 Mun Kum; Infinite Time

The "Infinite Time" (無窮) designation on this 2 Mun issue refers not to mystical ambition but to a specific furnace authorization system used by the Joseon court to manage the chronic copper shortages of the mid-18th century. Minting rights were parceled out to Buddhist temples, military offices, and government bureaus under rotating permits — the inscription identified the issuing authority's casting series rather than a denomination variant.

By 1753, Joseon's monetary policy was still recovering from the chaotic over-issuance that followed the 1678 introduction of the Sangpyeong Tongbo coinage system. Provincial casting quality varied wildly across authorized furnaces.