Circulating Piece.
Obverse: head of Caesar in laurel wreath, to the right, in the rim legend:
CONSTANTINVS IVN NOB C;
Reverse: camp gate of 9 rows of bricks, with open gate, in the rim legend:
PROVIDEN-TIAE CAESS; in section ESIS half-moon;
Bronze, diameter 18 mm, weight 2.72 g, axis 7 h.