I just got a lot of two Roman tetradrachms while scrounging on eBay. One of them I figured out fairly easily, but this one I am not so sure of: This is as close as I came - Egypt Potin Tetradrachm Maximianus Year 4 (289/290 A.D.) Alexandria Mint [A K M OVA MAΞI]MIANOC CEB, laureate, draped & cuirassed bust right / Nike advancing left holding palm & wreath, Δ L left field, star behind. ????? (8.40 grams / 18 mm) I just cannot find another example or catalogue reference online anywhere. And I am not sure I have the right emperor. Any help greatly appreciated.