Constantine I, AE follis, London, 314-315 AD.

IMP CONSTANTINVS AVG, laureate and cuirassed bust right.
MARTI CON-SERVATORI, Mars standing right, helmeted and in 
military dress holding spear, point downwards and resting
left hand on shield.
S-F across fields.
Mintmark MLL. 

RIC VII London 24.
Extremely rare (R4). 
Extremely fine.

With permission of ArtCoins Roma, Auction 6, Dec. 2012.