I also think it's cuirassed. Here's one of mine for comparison where the shoulder pteruges (cf "epaulettes") seem to rule out a trabea.
Lech may be right about the officina.
There seems to be an officina assignment in use at Aquileia at this time, based on seniority.
The majority of the coins fit the pattern:
P for Constantine
S for Licinius
Gamma for Maximinus
I've been inclined to regard coins outside of this pattern as mules, or perhaps they belong to the beginning/end of this period of production.
Ben