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1 Mon 'Jōgan Eihō' - Seiwa
| Issuer | Imperial Japanese Government |
|---|---|
| Year | 870-890 |
| Type | Log in to see details |
| Value | Log in to see details |
| Currency | Log in to see details |
| Composition | Log in to see details |
| Weight | Log in to see details |
| Diameter | Log in to see details |
| Thickness | Log in to see details |
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| Technique | Log in to see details |
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| Engraver(s) | Log in to see details |
| In circulation to | Log in to see details |
| Reference(s) | DHJ#1.55 - 1.58 |
| Obverse description | Cast copper cash coin of typical East Asian square-holed round form, bearing a four-character reign legend in Chinese kaishu (regular script) disposed clockwise around a central square perforation. The characters 貞, 觀, 永, and 寳 are arranged in the four cardinal positions — top, right, bottom, and left respectively — each framed between the inner square rim and the outer circular rim. The raised legends are rendered in bold relief against a flat field, with the stroke weight and foot details varying by die variety as documented in DHJ nos. 1.55–1.58. The coin exhibits a deeply patinated dark olive-brown and verdigris surface consistent with prolonged burial, typical of Heian-period coinage. |
|---|---|
| Obverse script | Log in to see details |
| Obverse lettering | 貞 寳 觀 永 (Translation: Everlasting treasure of the Jōgan era (read clockwise)) |
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| Reverse lettering | Log in to see details |
| Edge | Log in to see details |
| Mint | Imperial Mint, Heian-kyō |
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