Valentinian III. 425-455 AD. AV Solidus (4.48 gm). Struck AD 426-430, Ravenna mint. 

D N PLA VALENTI-NIANVS P F AVG, rosette-diademed, draped and cuirassed bust right.
VICTORI-A AVGGG, Valentinian standing facing, holding long cross and Victory on globe, placing his foot on human-headed coiled serpent.
R-V across fields.
Mintmark COMOB. 

RIC X 2011; DOCLR 841; Depeyrot 17/1. 

HJB ebay sale, Jun-23 2000