this is coin #83 in my Constantine I coins from London.
Constantine I
A.D. 309- 311
23x24mm 4.1g
IMP CONSTANTINVS P F AVG; laureate and cuirassed bust right.
MARTI CONSERVATORI; Mars helmeted, in military dress, stdg. r. looking r., holding reversed spear, hand resting on shield; across fields T-F.
in ex. PLN
RIC VI London 118; LMCC 6.02.005