Province Bithynia-Pontus
City Nicaea 
Region Bithynia
Reign Severus Alexander
Obverse inscription ΙΟΥΛΙΑ ΜΑΜΑΙΑ ΑΥΓ
Obverse design draped bust of Julia Mamaea, right
Reverse inscription ΝΙΚΑΙΕΩΝ
Reverse design Zeus seated left, holding patera and sceptre

 

Reference Gitbud & Naumann eBay sale
Diameter 22
Weight
Axis
Note