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Mameitagin 'Tenpō Mameitagin' 保 around 寳
| Issuer | Tokugawa Shogunate (Edo Mint) |
|---|---|
| Year | 1837-1858 |
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| Composition | Billon (.260 silver) |
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| Obverse description | Centrally placed large kanji character 寳 (Hō, meaning 'treasure') rendered in bold relief, surrounded by a cluster of four smaller kanji characters 保 (Ho) arranged symmetrically in the field at the cardinal positions. The inscription is deeply struck into the irregular convex flan in a distinctive hammered style characteristic of Edo-period mameitagin coinage. The overall composition fills the field without a formal border, consistent with the bean-shaped planchet format. The surface exhibits the characteristic dark patina and textured field of circulated billon coinage of the Tenpō era. |
|---|---|
| Obverse script | Chinese (Kanji) |
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| Reverse description | Intentionally left as a rough, unworked blank surface with no inscriptions, devices, or design elements struck. The reverse displays the natural convex contour of the hammered billon planchet, with an irregular, granular texture resulting from the bean-casting and hammering production process. Patches of oxidation and surface porosity are consistent with the low-silver billon alloy used during the Tenpō period. No mint marks or additional countermarks are present. |
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