Puede ser este AE3 de Constancio II, del tipo del "matao" de la ceca de Arlés 2ª oficina (en exergo: SCON):
Constantius II AE3. 353-355 AD. DN CONSTANTIVS P F AVG, diademed, draped bust right / FEL TEMP-REPARATIO, soldier standing left, spearing fallen horseman, who is wearing a Phrygian helmet, reaching backwards. D in left field, known mintmarks: PCON, SCON, TCON.
Arles
RIC VIII 215
http://wildwinds.com/coins/ric/constantius_II/_arles_RIC_viii_215_2.jpg
Un saludo
"Qvod tibi fieri non vis, alteri non feceris"