I've bought this coin from
ebay. It's 13 mm, has signs of electroplate that are visible on the pictures. I checked on Wildwinds and other web sites and found the similar Rev. side: Helmeted soldier (it looks like shield on left arm) spearing fallen horseman. In left field of reverse: some(?) letter. Per reverse side it could be either Constantius II or Constantius Gallus; however: 1. All coins of them are significantly larger 18 - 22 mm; 2. I couldn't find the Obv. side similar to my coin. My coin Obv. Bearded bust right, looks like pearled diadem.
So, could somebody help me to identify this coin, its mint and appox. value.


