Constantius II AE18 follis, Nicomedia. AD 328-329. 2.41 g.

FL IVL CONSTANTIVS NOB C, bare-headed, draped, cuirassed bust left.
PROVIDEN-TIAE CAES dot, campgate, two turrets, eight layers,
star above, no doors.
Mintmark SMN delta.

RIC VII Nicomedia 158 var (bust type), LRBC 1114.
Very rare, possibly only the third known, the 
other two being in the Vienna collection.

With permission of Monnaies d'Antan auction 18, Lot 479, Nov 2015. (described as Constantine II in error).