DELMATIUS, as Caesar. 337 AD. AE4. Thessalonica mint. 

FL DALMATIVS NOB C, laureate, draped and cuirassed bust 
right
GLORI-A EXER-CITVS, two soldiers, each holding reversed 
spear and resting on shield, with one standard between
them.
Mintmark SMTS delta. 

RIC VII Thessalonica 227, rated R3.

Contributed by coin store of forumancientcoins.com.