Similar to this one (slightly different reverse inscription) Alexandria Troas Quasi-autonomous, circa 198-268 AD; AE, probaby about 21 mm Obv: AV CO TRO, turreted and draped bust of Tyche right Rev: COL ALE AVG TRO, Apollo Smintheus standing right, holding bow and phiale, quiver over shoulder Refs: Bellinger, Troy, p. 148, 469 See: http://www.asiaminorcoins.com/gallery/displayimage.php?pid=13007
Not particularly rare, but interesting. I like these quasi-autonomous issues by this city. Here's one from my collection: