Herennius Etruscus as Caesar (249-251). AR Antoninianus. Rome mint, 250 AD. Obv. Q HER ETR MES DECIVS NOB C. Radiate and draped bust right. Rev. PIETAS AVGVSTORVM. Sprinkler, simpulum, jug, patera and lituus. RIC IV 143. 4.90 g. 20.00 mm. Traces of ancient silvering. EF/About EF.