I just picked up a couple of RR denarii, one of which is this denarius of M. Herennius. The obverse shows the divine personification Pietas. The reverse depicts the Catanian legend of Amphinomus and Anapias, who chose their elderly parents over gold when fleeing the volcanic eruption of Mt. Etna. Hard decisions, those Romans had to make. Any idea what causes surface roughness on some silver coins? Please share your coins of M. Herennius!