4 Mon 'Kan'eitsūhō' Bosen, Reverse イ I, narrow waves

正面描述	Round cast copper-alloy coin featuring a central square hole (方孔, hōkō) bordered by a raised square rim. Four large Chinese characters in kaisho style are arranged in the four cardinal positions around the central aperture, reading clockwise from the top: 寛 (Kan), 通 (tsū), 永 (ei), 寶 (hō), together forming the legend 'Kan'eitsūhō' (寛永通寶). The characters are bold and deeply cast in relief against a flat field, with a raised outer rim encircling the entire obverse.
正面文字	登录以查看详情
正面铭文	登录以查看详情
背面描述	The reverse displays an elaborate pattern of eleven narrow wave-forms (波紋, hamon) radiating outward from the central square hole and filling the entire field in a fan-like, segmented arrangement, creating a distinctive 'bosen' (母銭, master coin) design. The wave motifs are rendered in low but crisp relief, divided into upper and lower registers by the square aperture. Immediately above the central square hole, the katakana character イ (I) is cast in relief, serving as a mint or batch identification mark. A plain raised outer rim borders the reverse field.
背面文字	Japanese (Katakana)
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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