Constantine II, AE follis, Siscia.

CONSTANTINVS IVN NOB CAES, laureate, draped, cuirassed bust right (small bust type).
VICTORIAE LAET PRINC PERP, two Victories standing facing one 
another, holding shield inscribed VOT PR on altar, Altar 
decoration X (Helv. 7s).
Mintmark ASIS dot.

RIC VII Siscia 72 var (unlisted altar decoration for this
series).
The listed version of officina A is rated R4.

From Dane's collection, August 2012.