Gratian AR Siliqua, 1.24 gr, 14.22 mm. Aquileia. 375-378 AD. 

Obv: DN GRATIA-NVS PF AVG, pearl-diademed, draped & cuirassed bust right 
Rev: VRBS-ROMA, Roma seated left on cuirass, holding Victory on globe and 
 reversed spear. 

(From the visible tops and bottom parts of letters, it can only be this coin). 
RIC IX Aquileia 15b, rated rare.

Contributed by Dane for TimeLine Originals, December, 2008.