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

Coin no. 6 of RPC VII.2, 1859


Museum Kunsthistorisches Museum, Vienna (Austria)
Inventory no. GR 15456
Diameter 21.8
Weight 3.57
Axis 12