Diocletian, Potin Tetradrachm, Alexandria. Year 5, 288-289 AD. 

Obv: A K GOYA DIOKLHTIANOC CEB, laureate, draped and cuirassed bust right, seen from behind.
Rev: L-E, eagle standing right, wreath in beak, palm on wing; star above right.

Emmett 4041; Milne 4920.

With permission of Roma Numismatics, Oct, 2010