Commodus, AE tetradrachm of Alexandria, Egypt. Dated Year 21. AD 180-181. M AVRH KOMMO ANTWNINOC C (or CE), laureate head right. LK A above emperor, holding eagle-tipped sceptre and reins, in slow quadriga right. Milne 2622-2623; BMC 1429; Dattari 3852. Contributed by carpediem numismatics, April 2017.