This is a fairly rare type that someone has tried to improve a bit with tooling. Notice that Constantine has a peculiar looking smile. In the past few years, Lanz has offered more than a few improved coins. This one sold for $122.
Constantine I
A.D. 313- 315
quarter follis
13mm 1.0gm
CONSTANTINVS AVG; bare head
SAPIENT PRINCIP; Altar with owl, spear across altar, shield to left and helmet to right.
In exergue PTR
RIC VII Trier 65
