Herennius Etruscus as Caesar (250-251). AR Antoninianus. Struck under Trajan Decius, Rome mint, 250 AD. Obv. Q HER ETR MES DECIVS NOB C. Radiate and draped bust right. Rev. PIETAS AVGG. Mercury standing left, holding purse and caduceus. RIC IV (Decius) 142b; C. 11. 3.90 g. 22.60 mm. Scarce. Superb example, lightly toned with underlying luster. Metal flaws. Good EF/Good VF.