here's a nice example with lots of silvering
Constantius II
A.D. 326
18x19mm 2.8gm
FL IVL CONSTANTIVS NOB C; Laureate, draped and cuirassed bust left.
PROVIDEN-TIAE CAESS; camp gate with two turrets and star between them.
In ex. T crescent T
RIC VII Ticinum 201
here's another example that recently sold, it looks almost crude compared to the first example. The style seems a little awkward and the campgate is short and blocky. I would call it unofficial, but the legends are perfect; maybe an engraver in training did the bust and reverse design.
Constantius II
A.D. 326
19mm 2.5gm
FL IVL CONSTANTIVS NOB C; Laureate, draped and cuirassed bust left.
PROVIDEN-TIAE CAESS; camp gate with two turrets and star between them.
In ex. P crescent T
RIC VII Ticinum 201
Those are some super campgates!