Diocletian, Potin Tetradrachm, Alexandria, Egypt. Year 3, 286-287 AD 

Obv: A K GOYA DIOKLHTIANOC CEB, laureate & cuirassed bust right 
Rev: Athena standing left, holding Nike, and resting left hand on shield. L-G 
 in left field. 

Milne 4811

Contributed by Dane for George Clegg (biggyg2), December, 2008.