Silver antoninianus, 22mm, 4.56gm, issued AD 250/251 Rome mint.
Obv: Q HER ETR MES DECIVS NOB C, Radiate, draped bust right.
Rev: PRINCIPI IVVENTVTIS, Apollo seated left, holding branch and resting elbow on lyre.
References: Sear 9522, RIC 146, RSC 24a.
Minor adhesions.