Constantius I, Rome, AE16 mm, 317-318 AD.

DIVO CONSTANTIO PIO PRINC, Laureate and veiled head right
MEMORIAE AETERNAE, eagle standing right, head left. 
Mintmark: RS.

Mintmarks known: RP, RS, RT or RQ.

RIC VII Rome 111, rated R3.

Contributed by Dr. Hubert Lanz, auction November 2000, 
Added July 2011.