This is a coin that you might need to see several to understand the reverse. Yours is strong on the prow and Victory but rather than the throne details being even, it looks like Victory is on a column besides the Concordia figure. I suggest you shop around for a coin of Honorius or Theodosius with the same reverse from Antioch and see if they do not present an interesting comparison. RIC says they also come from Cyzicus and Constantinople but I don't have those and don't know how the style differs there. There would be many worse coins to build a set out of since the facing busts are interesting. It is a coin worth owning.