Constantius II, AE4, Antioch mint. 337-341 AD.

CONSTAN-TIVS AVG, pearl-diademed, head only, right.
GLOR-IA EXERC-ITVS, two soldiers holding spears and shields with 
one standard between them. 

X on banner, dot at upper left and right of banner top.
Mintmark: SMANB.

RIC VIII Antioch 54 var (banner decoration), rated scarce.

From Dane's collection, ex www.kentcoins.co.uk. July 2012
Another, found in Spain, was sold in 2009 by ebay-seller 
lucerna.