Constantine I, AE follis, Rome, struck ca AD 320. 19 mm, 2.86 g.

CONSTANTINVS AVG, cuirassed bust right, wearing high-crested helmet decorated with two stars.
VIRTVS AVGG, Campgate with no doors and three beacons. 

P-R across fields.
Mintmark RT.

RIC VII Rome 167.

With permission of Leu Numismatik AG - Web Auction 25, Lot 3044, March 2023.