Date range does not make sense. [решено]

This coin is listed as being issued from 1837 to 1858, the same date range as the Tempo Ichibukin (N#282563). And the Ansei era does not start until 1854.

Thanks, should be 1859.

Idolenz

Thanks, should be 1859.

Thank you for the clarification. The source I tend to default to for pre modern Japanese coins, David Hartill's book, also has the erroneous date range for this specific coin. Could I also ask what sources you use? I want to expand my available resources.

https://en.numista.com/L110923