Helena, mother of Constantine I, first wife of Constantius I
 (born ca. 248 A.D. - died 330 A.D.)
-  AE4 - 16.72mm, 1.59gr
Obverse - FL IVL HE-LENAE AVG
Helena, her pearl-diademed and mantled bust right,
wearing necklace.
Reverse - PAX PVBLICA dot
CONSE in Exergue
Pax standing left, holding branch and transverse scepter
Minted posthumously under Constantius II at officina E in Constantinopolis (Istanbul, Turkey) between 337 and 340 A.D.

Reference:
Kent, J.P.C.,"Roman Imperial Coinage", Volume 8 (RIC), Constantinople, p449, nr 33, obverse H1/M.
Carson, R.A.G., Hill, P.V., & Kent, J.P.C., "Late Roman Bronze Coinage",  Part I,  p25, nr. 1046, obverse 6cW
Failmezger, V., "Roman Bronze Coins From Paganism To Christianity 294-364 A.D.", nr 384H
Sear, D.R., "Roman Coins and their Values" (RCV 4th Revised Edition), p329, nr. 3910, variety with CONSE.
Suarez, R., "Encyclopedia of Roman Imperial Coins II" (ERIC2),  p888, nr.116 (B1, O2, R1, T1, M04, CONSE dot)
Van Meter, D., "Handbook of Roman Imperial Coins", p293, nr 4.

Quality: Fine