Gratian, AE3, 17mm, Antioch. AD 378-383 AD. 

DN GRATIA-NVS PF AVG, rosette-diademed, draped, cuirassed bust right.
CONCOR-DIA AVGGG, Roma, helmeted, seated facing, head left, holding globe and spear, the lower part of which is hidden by robe, her left leg bare. 

Theta in left field, Phi over K in right field. 

Mintmark ANT Epsilon. 

RIC IX Antioch 45a var (this bust type not listed for RIC 45)
Rare.

Contributed by Lucernae on Catawiki coin sales