Valentinian I AR Siliqua. 2.13 g. Rome. AD 364-367. 

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.

Mintmark RT. 

RIC IX Rome 11a; Cohen 81

With permission of Dr Busso Peus Nachfolger, June 2009