Troas, Alexandria, Pseudo-autonomous, Time of Trebonianus Gallus (251-253) AE (Bronze, 5.62g, 21mm)
Obv: ALEX TRO, Turreted and draped bust of Tyche right; to left, AV/CO in two lines on vexillum.
Rev: COL AVGO / TROA, Horse grazing right.
Ref: RPC IX 485; Bellinger A486 var. (rev legend arranging)