Constantine I (307-337). AE Follis, Treveri mint, 310-313. Obv. IMP CONSTANTINVS AVG. Laureate and cuirassed bust right. Rev. MARTI CON-SERVATORI. Mars, helmeted, standing right, leaning on reversed spear with right hand and placing left hand on shield. RIC VI Treveri 859. 4.17 g. 22.5 mm. Slightly rough surfaces and cleaning marks. VF.