2 Mun Hun; Infinite time

发行方	Joseon Dynasty Board of Revenue (Hojo)
年份	1752
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面值	登录以查看详情
货币	登录以查看详情
材质	Cast brass
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正面描述	Central square hole surrounded by four Chinese characters arranged in cruciform fashion within the coin field. Reading clockwise from top: 常 (Sang), 通 (Tong), 平 (Pyong), 寶 (Bo), forming the legend 常平通寶 (Sangpyong Tongbo), identifying the Sangpyeong Bureau and denoting official currency of the Joseon Dynasty. The characters are rendered in regular script (kaishu) in relief against a plain field, with the square central perforation serving as the compositional anchor of the design.
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正面铭文	登录以查看详情
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边缘	登录以查看详情
铸币厂	登录以查看详情
铸造量	ND (1752) 訓 ND (1752) 訓 - concave star(concave dot) at Rev right ND (1752) 訓 - concave star(concave dot) at Rev left
附加信息	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.

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