Crispus AE follis, Rome. AD 317-326

CRISPVS NOBIL CAES, laureate, cuirassed bust right.
PRINCIPIA IVVENTVTIS, Prince helmeted, in military dress, 
standing right, holding reversed spear, left hand on shield 
set on ground.

A in left field.
Mintmark RQ. 

RIC VII Rome 90; Cohen 100

Contributed by CarpeDiem Numismatics, March, 2018