3 Cash - Jianyan Tongbao, Seal script

正面描述	Central square hole (穿) surrounded by four Chinese seal-script characters reading 建炎通寶 (Jianyan Tongbao), arranged in a cruciform reading pattern — top, right, bottom, left — within a plain inner border. The characters are boldly cast in archaic seal script (篆書), exhibiting rounded, regular strokes characteristic of Song dynasty numismatic art. A raised inner rim frames the central perforation, while a plain outer rim defines the coin's periphery. The flat field displays a mottled dark green patina consistent with long burial, with minor surface porosity typical of period cast bronze. The overall fabric is well-struck with clear legend definition.
正面文字	Chinese (seal script / 篆書)
正面铭文	登录以查看详情
背面描述	Plain reverse featuring a central square hole (穿) framed by a raised inner border, with a broad, flat, unadorned field extending to a plain outer rim. No legend, marks, or decorative elements are present. The surface exhibits a consistent dark green cuprite and malachite patina with areas of earthen encrustation, typical of Song dynasty cast bronze coinage recovered from archaeological contexts. The rim is moderately raised and well-defined, consistent with production from a carefully prepared clay mold.
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背面铭文	登录以查看详情
边缘	登录以查看详情
铸币厂	登录以查看详情
铸造量	登录以查看详情
附加信息	登录以查看详情

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