Constantine I (307-337). AE Follis, Londinium mint, 307-310 AD. D/ IMP CONSTANTINVS P F AVG. Laureate and cuirassed bust right. R/ MARTI PATRI PROPVG. Mars advancing right, holding spear and shield; inexergue, PLN. RIC 108. AE. g. 6.76 mm. 28.00 Nice deep green patina. VF/Good VF.