Constantine II AE follis of Cyzicus. AD 317-340. 18 mm, 3.25 g.

CONSTANTINVS IVN NOB C, laureate, draped and cuirassed bust left.
PROVIDENTIAE CAESS, campgate, two beacons, eight layers, star above. 

Mintmark SMK Gamma. 

RIC VII Cyzicus 26; Sear 17250. 

With permission of Savoca Numismatik auction 118 Silver, Lot 627, Nov. 2021.