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 serpent coiled around tripod

Coin no. 5 of RPC VII.2, 1860


Museum Fitzwilliam Museum, Cambridge (UK)
Inventory no. 207-1948
Diameter 20
Weight 3.19
Axis 1