| Emisor | Japan |
|---|---|
| Año | 870-890 |
| Tipo | Standard circulation coin |
| Valor | 1 Mon |
| Moneda | Mon (683-1953) |
| Composición | Copper |
| Peso | 2.8 g |
| Diámetro | 19.5 mm |
| Grosor | |
| Forma | Round with a square hole |
| Técnica | Cast |
| Orientación | |
| Grabador(es) | Fujiwara Ujimichi |
| En circulación hasta | 25 November 0987 |
| Referencia(s) | DHJ#1.55 - 1.58 |
| Descripción del anverso | Four characters around hole |
|---|---|
| Escritura del anverso | |
| Leyenda del anverso | 貞 寳 觀 永 (Translation: Everlasting treasure of the Jōgan era (read clockwise)) |
| Descripción del reverso | Plain |
| Escritura del reverso | |
| Leyenda del reverso | |
| Canto | Smooth |
| Casa de moneda | |
| Tirada | ND (870-890) - DHJ# 1.55; large characters - ND (870-890) - DHJ# 1.56; 貞 and 寳 have short feet - ND (870-890) - DHJ# 1.57; wide 貞 with spread feet - ND (870-890) - DHJ# 1.58; small 貞 - |
| ID de Numisquare | 3575722370 |
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