Constantine I, AE follis, Rome mint, 312-313 AD. 17mm 2.3gr.

FL VAL CONSTANTINVS AVG, laureate and draped bust right, seen from the back.
PACI PERPET, Pax standing left, holding branch and standard.
XII in left field.
Mintmark RT.

RIC VI Rome 355, unlisted officina.

Contributed by victors_imperial_coins on vcoins.com, March 2013.