According to Strabo, this site was first called Sigeia; around 306 BC Antigonus refounded the city as the much-expanded Antigonia Troas by settling the people of five other towns in Sigeia, including the once influential city of Neandreia. It did not receive its name until its name was changed by Lysimachus to Alexandria Troas, in 301 BC, in memory of Alexander III.
As the chief port of north-west Asia Minor, the place prospered greatly in Roman times, becoming a "free and autonomous city" as early as 188 BC, and the existing remains sufficiently attest its former importance. In its heyday the city may have had a population of about 100,000. Strabo mentions that a Roman colony was created at the location in the reign of Augustus, named Colonia Alexandria Augusta Troas. Augustus, Hadrian and the rich grammarian Herodes Atticus contributed greatly to its embellishment; the aqueduct still preserved is due to the latter. Constantine considered making Troas the capital of the Roman Empire.
It is unknown when the city was destroyed, but it continued to exist at least into thr 10th Century.
Modern location: Southeast of Dalyan, Turkey
Reverse: AΛEΞANΔPOY - Zeus seated left, right leg drawn back, holding eagle and sceptre. IHAΡ monogram in upper left field, IΛT monogram in left field, horse grazing left below.
Die Orientation: 11 H
Weight: 15.9 g
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Reverse: COL AVG, horse grazing right; TRO in exergue
Die Orientation: 1 H
Weight: 5.47 g
A pseudo-autonomous issue struck during the reign of Gallienus
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Reverse: COL AVG TRO, eagle, wings spread, standing right on head of bull
Die Orientation: 11 H
Weight: 5.69 g
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Reverse: COL AVG, she-wolf standing right, suckling the twins Romulus and Remus; TRO in exergue
Die Orientation: 6 H
Weight: 4.88 g
Reverse: Apollo left leaning foot on pedestal, holding branch; COL A_LEXA AVG
Die Orientation: -
Weight: 6.7 g
Reverse: ? ALEXAN ?, Horse grazing facing right, COL in exergue?
Die Orientation: 12 H
Weight: 4.43 g
The closest I could come to matching this up was by looking at sold examples, the type matches with " Bellinger A283", but the inscriptions on my coin are quite different on both sides.
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Reverse: COL AVG, horse grazing right; TRO in exergue
Die Orientation: 5 H
Weight: 5.49 g
Reverse: grazing horse right; COL AVG / TRO
Die Orientation: -
Weight: 9.9 g