Constans, AE15 follis. Arles. AD 336.

FL IVL CONSTANS NOB C, laureate, draped, cuirassed bust right, seen from the back.
GLOR-IA EXERC-ITVS, two soldiers standing facing each other, each holding spear and resting hand on shield, two standards between them; chi-rho on banner.

Mintmark SCONST. 

RIC VII Arles 397.
Rated scarce.

With permission of cngcoins.com, auction 350, Lot 590, May 2015.