Type 82: AE4. CASTRA(N) [several spelling variants]
Camp gate, star above [like VOT PVB, type 71, but with a different legend]
c.440-455 [RIC p. 174]
[No image]
Only Valentinian III.
RIC 2160-2163, all "C" for Valentinian III, page 380, plate 53, 3 photos.
"This is very common, and many irregular versions of it exist." RIC p. 175.