1. B : to stamp (a different coin design or a Countermark) onto a coin counterstamp a coin of Heraclius on a coin of Justinian counterstamp a Texan 8- real piece on a Mexican 5-real piece

2. A Countermarked, punchmarked or counterstamped coin is a coin that has had some additional mark or symbol punched into it at some point after it was originally produced while in circulation