Alexandria, Troas. AE21, semi-autonomous. 138-268. 5.28 g. AV CO TRO, Turreted and draped bust of Tyche right; CO AV on vexillum to left. COL AVG TRO, horse grazing right. Bellinger A486; SNG von Aulock 1466; BMC 45-50; SNG Munich 54-58; SNG Cop 108-113; Hunter 9-13; McClean 7763-7765; SNG Tuebingen 2532 With permission of cngcoins.com. Aug 2013