A nice piece with very good details.
Coin appreciated by RIC authors with a very high rarity grade of R5 denoting an item known in one piece....
Obverse: august head in rosette diadem, to the right, in the rim legend:
CONSTAN-TINVS AVG;
Reverse: camp gate of 6 rows of bricks, with open gate, in the rim legend:
PROVIDEN-TIAE AVGG; in SMNE section;
Bronze, diameter 19 mm, weight 3.01 g, axis 5 h.