Diocletian, Post abdication Follis, Ticinum, AD 306. 

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. 

A in left field, small dot in centre.
Mintmark PT.

RIC VI Ticinum 67a; Sear 12930.
Rated scarce.