The Constantine VLPP from Siscia are listed in RIC as cuirassed only, though I have had several with drapery. My latest example clearly has a fibula and cloak trailing over left shoulder. The engraver made a distinction with "rivets" on the cuirass and then the plain bit which is the cloak.
Constantine I
A.D. 319
19mm 2.6g
IMP CONSTANT-INVS AVG; high crested helmet, draped and cuirassed bust l,, spear across r. shoulder, shield on left arm
VICTORIAE LAETAE PRINC PERP; two Victories stg., facing one another, together holding shield [wreath] inscribed VOT PR on altar.
in ex. ΓSIS•
RIC VII Siscia 61 var.