Constantius II, AE4, Aquileia, 337-341 AD  14 48mm; 1 51g 

CONSTANT-IVS PF AVG, laurel and rosette-diademed, draped, cuirassed bust right 
GLOR-IA EXERC-ITVS, two soldiers holding spears and shields 
with one standard between them, two palm branches to left
and right of the top of the banner 
Mintmark: AQP 

RIC VIII Aquileia 21 

Courtesy of the finder  Metaldetector find in Oxfordshire