> “Together the two kings carried out a major reform of the coinage, introducing high-quality silver coins, with the ‘two emperors’ design symbolizing this alli

> “Together the two kings carried out a major reform of the coinage, introducing high-quality silver coins, with the ‘two emperors’ design symbolizing this alliance.” I wonder about the nature of this reform. E.g. were prior coins not made of "high-quality silver"?