Constantine II, AR Siliqua, Trier. 19mm, 2.50 gr. 337-340 AD. 

IMP CONSTA-NTINVS AVG, pearl diademed, draped, cuirassed bust right.
VICTORIA AVGG NN, Victory advancing left, holding wreath and palm.
Mintmark: TRS.

RIC VIII Trier 28; Cohen 583 (Constantine I)

Very rare (R3)

Contributed by Dr. Hubert Lanz, auction November 2000, 
Added July 2011.