Diocletian, Post abdication Follis, Serdica, AD 305-306 AD, 8.84g, 

DN DIOCLETIANO BAEATISSIMO SEN AVG, laureate bust
right, wearing imperial mantle, holding olive-branch
and mappa.
PROVIDENTIA DEORVM QVIES AVGG, Providentia standing right, 
extending right hand to	Quies, standing left, holding branch and 
sceptre
S-F across outer fields.
Delta in lower centre.
Mintmark dot SM dot SD dot.

RIC VI Serdica 14a; Sear 12939
Rated common.