Probus, Potin Tetradrachm, Alexandria, Year 6, 280-281 AD. Obv: A K M AVP PROBOC CEB, laureate, cuirassed bust right. Rev: Athena seated left on throne, holding Nike flying outwards, holding wreath in both hands, and sceptre. Milne 4617-4621 (different weights and sizes). With permission of Roma Numismatics, October, 2010