CHINA TAI CHING TI KUO COPPER COIN Error?

Description

Don't know anything about it except the one side is almost completely smooth  -
could be wear or could be an error(does not look like wear to me but I'm an amateur).
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not paid for in 3 days will be relisted.
Returns are accepted for items not as described only.
Returned items must be received
in original
condition! Items paid for on Fri. or Sat. will not
ship until the following Monday.