Valentinian I, AV Semissis, Nicomedia. AD 367-375 AD. 17mm, 2.19 g.

DN VALENTINI-ANVS PF AVG, pearl-diademed, draped, cuirassed bust right.
GLORIA ROMANORVM, Victory seated right on cuirass, shield behind
 her, inscribing VX on shield resting on her knee and supported 
by Genius at foot right.

Mintmark SMN. 
Biaggi 2246; RIC -; Cohen -;.
Extremely Rare. 

With permission of Roma Numismatics, April 2016
Estimate £1,000.