Delmatius, Lyons, 335-337 AD.

FL DELMATI-VS NOB CAES, laureate, draped, cuirassed bust right.
GLOR-IA EXERC-ITVS, two soldiers, holding spears and shields 
with one standard between them with O on banner.

Mintmark: palm branch PLG (or SLG) palm branch.
RIC VII Lyons 288 var.

Unlisted var with palm branch at the end of the mintmark. 

Found on the Thames riverbank, Feb. 2011 by Mike.
Despite the wear, numerous details of this coin, i.e. the 
visible parts of the obverse legend, FL.. NOB CAES, the
laureate bust (as opposed to pear-diademed), the palm branch
at the start of the mintmark, the LG in the mintmark etc.
make the attribution to Delmatius of Lyons certain.