Japan
Tempo gold Koban (Ryo) ND (1837-1858) AU (Surface Hairlines), Edo mint, KM-C22b, JDNA 09-21, Hartill-8.24 (ER). 60x32mm. A very well-executed example, admitting the usual light marks and hairlines, though virtually pristine in the struck-up details.
https://coins.ha.com/itm/japan/japan-tempo-gold-koban-ryo-nd-1837-1858-au-surface-hairlines-/a/3084-30290.s?type=CoinArchives3084
HID02906262019
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Estimate: 800-1000 USD