Herennius Etruscus Caesar, Sestertius, 14,30 g., mint of Rome, 250-251 AD.
Obv.: [Q HER ETR MES DECIVS NO]B C , Bare-headed, draped, and cuirassed bust right, seen from behind
Rev.: [PRIN]C I[V]VENTVTIS / S [C] , Apollo seated left, holding branch and resting elbow on lyre.
RIC IV part III, p. 143, #169a (Tr. Decius) ; Cohen 21.