Valentinian I Siliqua, 1.49g; 18mm, 364-367 AD. Lyons. 

Obv: DN VALENTINI-ANVS PF AVG, pearl-diademed, draped and 
cuirassed bust right
Rev: RESTITV-TOR REIP, Emperor standing facing, head right, 
holding labarum (plain shaft) and Victory on globe. 

Mintmark PLVG. Unlisted officina.

RIC IX Lyons 6a. Very Rare. Unlisted officina P. RIC lists 
only SLVG for this type with plain shafted labarum (others
have a barb (hook) or a cross or both.

With permission of Roma Numismatics, January, 2010