Herennius Etruscus. As Caesar, A.D. 250-251. AR antoninianus (23.6 mm, 4.25 g, 7 h). Rome mint, Struck A.D. 251. Q HER ETR MES DECIVS NOB C, radiate, draped and cuirassed bust of Herennius Etruscus right, seen from behind / PIETAS AVGG, Mercury standing facing, head left, holding purse and caduceus. RIC 142b; RSC 11. Good VF, well struck on oversize flan, lightly toned.