Circulating piece of a huge rarity of the variety.
Coin by the authors of the RIC catalog appreciated by the degree of rarity R5 denoting a single known piece.
Obverse: bust of Caesar in consular robe, wearing laurel wreath, LEFT, in the rim legend:
D N FL CL CONSTANTINVS NOB C;
Reverse: camp gate of 7 rows of bricks, with open gate, in the rim legend:
PROVIDEN-TIAE CAESS; in section -MHTE-;
Bronze, diameter 19 x 21 mm, weight 3.82 g, axis 11 h.