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1 Mon 'Kan'eitsūhō' Iron alloy, 小 'Ko' reverse
| Issuer | Japan |
|---|---|
| Year | 1737-1742 |
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| Composition | Log in to see details |
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| Diameter | Log in to see details |
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| Technique | Cast |
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| Obverse description | Log in to see details |
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| Reverse description | Plain reverse field surrounding the central square perforation, bearing a single small Chinese character 小 (Ko) positioned above the square hole, serving as a mint mark identifying the Koume-mura casting facility. The field is otherwise unadorned, with a raised outer rim and the characteristic wide square-hole rim (広穿) typical of this iron issue. The casting surface shows the rough, porous texture inherent to iron alloy production of the Edo period. |
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| Edge | Plain |
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| Mintage | ND (1737-1742) 小 - 広穿背小; small high 通; similar to copper counterpart - ND (1737-1742) 小 - 広穿背狭小; low 寶; similar to copper counterpart - |
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