Constantine  I Magnus (307-337 A.D.) - AE3 - 19.84mm, 2.10gr
Obverse - CONSTAN-TINVS AVG
Constantine, his laureate head right.
Reverse - PROVIDEN-TIAE AVGG,
Campgate with six rows, two turrets,  no doors, star above,
top and bottom row blocks.
SMTSE in Exergue, dot in right field
Minted at the 5th officina in Thessalonica (Saloniki, Greece) between 326 and 328 A.D.
Reference:
Bruun, P.M., "Roman Imperial Coinage", Volume 7 (RIC), Thessalonica, p518, nr 153, obverse 1-B1
Failmezger, V., "Roman Bronze Coins From Paganism To Christianity 294-364 A.D.", nr 352gCI
Carson, R.A.G., Hill, P.V., & Kent, J.P.C., "Late Roman Bronze Coinage",  Part I, p20, .nr 829
Sear, D.R., "Roman Coins and their Values" (RCV 4th Revised Edition), p326, nr. 3878, variety
Van Meter, D., "Handbook of Roman Imperial Coins", p292, nr 85
Quality: Fine