O/: IMP CONSTANTINVS PF AVG; bust r., laur., dr., cuir.
R/: PIETA-S AVGG [PIETAS AVGG]; emperor stg. l., loins draped with himation, r. stroking child to l., l. leaning on sceptre. C in left field, S in right field. PARL in exergue.
Ferrando 374
Two specimens known: 1 in Marseille, 1 in a private french collection (unluckily not for sale
)
See also: SCHMITT-CADET Alexis-Michel, "Un nouveau nummus de Constantin Ier à la Pietas (Arles, 317)", Bulletin du cercle d'études numismatiques (BCEN, vol. 49, n°2, Bruxelles, mai-août 2012, p. 64-67.