A nice piece in sand patina.
Not described in RIC variety with B5 bust included in NOT IN RIC catalog by Mr. Stępniewski.
Obverse: bust of Augustus in armor, wearing laurel wreath, to the right, in the rim legend:
CONSTANTINVS AVG;
Reverse: camp gate of 8 rows of bricks, with open gate, in the rim legend:
PROVIDEN-TIAE AVGG; in section PAhalf moonRL;
Bronze, diameter 18 x 21 mm, weight 2.51 g, axis 5 h.