Constantine I (307-337). AE Follis, Ticinum mint, 326 AD. D/ CONSTANTINVS AVG. Laureate head right. R/ DN CONSTANTINI MAX AVG. Camp gate with two turrets, no doors; above, star; in exergue, P crescent T. RIC 198. AE. g. 2.77 mm. 19.00 RRR. Extremely rare. Superb, fully silvered and prettily toned. About EF/EF.