Valentinian I AR Siliqua. (1.81 gr. 18.06 mm). Rome. 364-367 AD. 

Obv: D N VALENTINI-ANVS P F AVG, pearl-diademed, draped & cuirassed bust right
Rev: VRBS-ROMA, Roma seated left on throne, holding Victory on globe & reversed spear; RP in exergue. 

RIC IX Rome 11a, rated common; Cohen 81

Used with permission of TimeLine Originals (www.time-lines.co.uk), June 2009