A countermarked, punchmarked or counterstamped coin is a coin that has had some additional mark or symbol punched into it at some point during its career as a circulating coin. This practice is now obsolete.Countermarking can be done for a variety of reasons. If the currency is reformed, existing coins may be rendered void. In this situation, coins already in circulation could be marked with the new value (according to the new currency system). The life span of existing coins could thus be exten [...]
