Purchased unattributed:
Constantine I
CONSTAN-TINVS AVG, Laureate bust right
PROVIDEN-TIAE CAESS, Campgate with 6 rows, 2 turrets, star above
Mintmark T*AR (Arles, 3rd officina?)
The only campgates for Constanine I with the CAESS reverse legend are attributed as mules, so far only from Cyzicus. This reverse (legend and mintmark) seem to be Crispus, RIC VII Arles 268.
AFAIK, the third officina at Arles did not produce coins for Constantine I using this mintmark, meaning the obverse die must have been transported between officinae to produce this mule.
Does my attribution seem correct? Is anyone aware of additional examples of this coin?