Constantine  I Magnus (307-337 A.D.) -  AE2 Nummus (Reduced Follis) - 22.43mm, 3.77gr
Obverse - IMP CONSTANTINVS PF AVG
Constantine, his laureate, draped and cuirassed bust right.
Reverse - SPQR OPTIMO PRINCIPI
Legionary eagle facing left, between two vexilia
RQ in Exergue.

Minted at the 2nd officina (Q) in Rome in 312-313 A.D.

Reference:
Sutherland, C.H.V., "Roman Imperial Coinage", Volume 6 (RIC), Rome, p390, nr. 350a, obverse 1b (E)
Failmezger, V., "Roman Bronze Coins From Paganism To Christianity 294-364 A.D.", nr 241CI
Sear, D.R., "Roman Coins and their Values" (RCV Millennium Edition), Vol. 4, p469, nr. 16128
Van Meter, D., "Handbook of Roman Imperial Coins", p291, nr 64.

Quality: obverse Very Fine-, reverse: Very Fine+