Constantinus I AE Nummus, Mars reverse

Constantinus I (306-337 AD). AE Nummus (25-27 mm, 7.12 g). Treveri, c. 307-308 AD.
Obv. IMP CONSTANTINVS P F AVG, laureate and cuirassed bust to right.
Rev. MARTI PATRI PROPVGNATORI, Mars advancing right, holding spear and shield; S-A across fields, PTR in exergue.
RIC VI 775.

Almost extremely fine.