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1 Ryō "Tenpō Koban"
🇯🇵 Japan · 1 Ryō "Tenpō Koban" · 1589–1868
| Weight | 11.25 g |
| Composition | 56.80% Gold |
| Melt value | — |
| Reference | C# 22b, JNDA# 09-21, JC# 03-22 |
| Collector's Key World ID | CKW-JPN-102 |
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Varieties & References
No additional varieties recorded.
External references
Frequently Asked QuestionsFAQ
What is a 1837 Japan 1 Ryō "Tenpō Koban" made of?
0.568 Gold, weighing 11.25 g.
What is the melt value of a 1837 Japan 1 Ryō "Tenpō Koban"?
Its melt value is its metal content multiplied by the current spot price. See our melt calculator on the metals pages for a live figure.
Is the 1837 Japan 1 Ryō "Tenpō Koban" a key date?
It's a more common issue overall, though scarcer varieties may carry a premium — see the varieties list.
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