Constantine II AE follis, Aquileia, AD 321.

CONSTANTINVS IVN NOB C, laureate, draped and cuirassed bust  left.
CAESARVM NOSTRORVM around VOT X within wreath. 

Mintmark AQT 

RIC VII Aquileia 114; Sear 17190. 

With permission of Numismatik Lanz München - Auction 114, Lot 821, May 2003.