Marcus Aurelius, AE 28-30 ; sestertius / tetrassarion, mint of Rome? for Boatra or North Africa (Kyrene?), , 171-172 AD.
Obv.: AYT[OK]P KAIC M AYPHΛ - ANTWNEINOC CEB , laureate head of Marcus Aurelius right.
Rev.: ΔHMAPXIK - EΞOYC K S , head of Zeus Ammon r.
Sydenham, Caesarea 344 ; Auct. Schulten Apr. 84, 292 ; cf. Sear GIC 1662 ; cf. BMC 20.68.183
This coin has gone through a series of attributions, Some now think that the 13th legion from Cyrene stationed in Arabia was the reason for this mintage.