Crispus campgates from Constantinople are pretty rare.
Crispus
A.D. 326
19mm 2.7g
CRISPVS NOB CAES; Laureate, draped and cuirassed bust right.
PROVIDEN-TIAE CAESS; camp gate with two turrets and star between them; in left field B.
in ex. CONS
RIC VII Constantinople 8