City Commemorative AE3. 330-333 AD. Cyzicus. 

Obv: CONSTAN-TINOPOLI
CONSTANTINOPOLI, laureate and helmeted bust of Constantinopolis left, sceptre over shoulder / Victory standing left, foot on the prow of a ship, holding sceptre and leaning on shield,  SMKA in ex.

RIC VII Cyzicus 92, rated R4 (extremely rare)

With permission of Roma Numismatics, June 2009