Constantine I, AE follis, Trier. AD 319. 19 mm, 3.21 g. 

IMP CONSTANTINVS MAX AVG, laureate, helmeted and cuirassed bust left.
VICTORIAE LAETAE PRINC PERP, two Victories holding shield inscribed VOT-PR on an altar decorated with a star (Altar type Helv. 5a). 

Mintmark STR.

RIC VII Trier 214.
Very rare, rated R5.

With permission of Leu Numismatik Web Auction 11, Lot 2023, Feb. 2020.