Herennius Etruscus, as Caesar, 249-251. Antoninianus (Silver, 21 mm, 3.75 g, 1 h), Rome, circa 250-251. Q HER ETR MES DECIVS NOB C Radiate and draped bust of Herennius Etruscus to right, seen from behind. Rev. PIETAS AVGG Mercury standing front, head to left, holding purse in his right hand and caduceus in his left. Cohen 11. RIC 142b. Lustrous and clear. Struck from a slightly worn obverse die, otherwise, virtually as struck.