Constantine I AE follis, Aquileia. AD 322. 

CONSTAN-TINVS AVG, laureate head right, looking upwards.
DN CONSTANTINI MAX AVG, VOT XX in two lines within wreath, laurel branches to left and right.

Mintmark AQP.

RIC VII Aquileia 104v (this bust type not in RIC)

From Dane's collection, May, 2003.