Province Thrace
City Byzantium 
Region Thrace
Reign Severus Alexander
Obverse inscription ΙΟΥΛΙΑ ΜΑΜΑΙΑ ΑΥΓ(Ο)
Obverse design diademed and draped bust of Julia Mamaea, right
Reverse inscription ΕΠ ΦΡΟΝΤΩΝΟϹ ΒΥΖΑΝΤΙΩΝ
Reverse design dolphin, right, between two fishes, the above one right, the below one left

 

Reference CGT coll.
Diameter 27
Weight 12.01
Axis 12
Note Obverse legend has ΑΥΓ (not ΑΥΓΟ)