Looking through Wildwinds, there are possibilities other than Syria for ethnic-in-wreath bronzes. Perhaps Zeugma, Commagene? There is a listing for which the reverse ethnic is ZEYΓM-ATEωN-B, and I can make out ZE__M-__EωN-A on your coin. Can you read any of the obverse legend? Based on the general look of the portrait, I'd guess it is Marcus Aurelius, Commodus, or Lucius Verus. Provincials portraits often aren't true to Imperial likenesses.
http://rpc.ashmus.ox.ac.uk/coins/4/8607/ Volume 4 Number 8607 (temporary) Province Syria Region Commagene City Zeugma Reign Marcus Aurelius Person Marcus Aurelius (Augustus) Obverse inscription [ΑΥ]Τ ΚΑΙ Μ ΑΥΡ(Η) ΑΝΤωΝΙΝ[ΟС?] [? Obverse design laureate-headed bust of Marcus Aurelius wearing cuirass and paludamentum, r. Reverse inscription ΖƐΥΓΜΑΤƐωΝ, in lower field, numeral Α or Γ Reverse design in laurel wreath Metal Bronze Average diameter 22 mm Average weight 9.15 g Type reference BMC 13-15, Cop 29
Why "apparently"? The RPC link that was graciously gifted lists 12 examples. That many examples would indicate the coin is rather common. Certainly not rare... or even scarce. The ACS listing describes the type with a "radiate" head of Lucius Verus. The portrait on your example is Marcus Aurelius (and does not have a radiate crown).
