Constantine II, AE15, Constantinople, 337-348 AD.

DN CONSTAN-TINVS PF AVG, pearl and rosette diademed head right.
GLOR-IA EXERC-ITVS dot, two soldiers standing beside one
standard with O on banner.
Mintmark CONS gamma.

RIC VIII Constantinople 24, rated C2

From Dane's collection, Feb. 2011.