Gratian, AE3. Trier. 357-383 AD. 

Obv: DN GRATIA-NVS PF AVG, pearl-diademed, draped and cuirassed bust right.
Rev: VIRTVS ROMANORVM, Roma seated facing, head left, holding globe and reversed spear. 

Mintmark SMTR. 

RIC IX Trier 71a. Rare.

With permission of Roma Numismatics, Jul, 2010