Province Bithynia-Pontus
City Calchedon 
Region Bithynia
Reign Gordian III
Obverse inscription ⳞΑΒ ΤΡΑΝΚΥΛΛΕΙΝΑ Ϲ
Obverse design diademed and draped bust of Tranquillina, r.
Reverse inscription ΚΑΛΧΑΔΟΝΙΩΝ
Reverse design galley with four rowers, r.