Question

how do numismatic date the coins​

Answer 1

Answer:

The name of the coin collecter is called Numismatic or Numismatist

Explanation:

The key date refers to a date ( or date and mint mark combination) of given coin series or set that is harder to obtain that other dates in the series. The Next level of difficult to obtain coins in the series are often referred to as semi- key dates or simply semi - keys