Constantine the Great AE26 Follis, Trier mint, 307 AD.
Obverse: FL VAL CONSTANTINVS NOB C, D Laureate, cuirassed bust right.
Reverse: MARTI PATRI CONSERVATORI, Mars standing right,
holding reversed spear and leaning on shield.
In field: S-A. Exergue: PTR
RIC 725.
Contributed by Yuri Kabanov, April, 2006.