ARABIA, Bostra. Commodus. As Caesar, AD 166-177. Æ (14.7mm, 1.5 g, 6h). Bare-headed and cuirassed bust of Commodus right / Turreted and draped bust of Tyche right. Spijkerman 25 = Kindler, Bostra 15 var. (denomination).desert patina. Apparently a new denomination for this type for Commodus, as Caesar.