Constantine I, AE follis, London. AD 312-313. 21.3 mm, 3.2 g.

IMP CONSTANTINVS PF AVG, laureate, draped and cuirassed bust right.
MARTI CON-SERVATORI, Mars standing right, helmeted and in military dress, cloak spread over upper chest, holding upright spear, point downwards, left hand on shield.

Star in left field.
Mintmark PLN.

RIC VI London 251.
Rated scarce. 

Ex Bourton on the Water Hoard (1970). 

Contributed by Chris Scarlioli, June, 2023