Constantine II AE follis of Nicomedia. AD 337-340. 19 mm, 3.20 g.

CONSTANTINVS IVN NOB C, laureate, draped and cuirassed bust right.
PROVIDEN-TIAE CAES dot, campgate with seven layers, two  turrets, star above. 

Mintmark SMNA. 
RIC VII Nicomedia 157; Sear 17249.

With permission of VAuctions - Triskeles Sale 28, Lot 437, June 2019.