here's a nice example with toned silvering
Galerius
A.D. 295- 296
27x30mm 9.3g
GAL VAL MAXIMIANVS NOB CAES; laureate head right.
GENIO AVGG ET CAESARVM N N; Genius standing left, modius on head, naked but for chlamys over left shoulder, right holding patera, left cornucopiae.
In ex. K A
RIC VI Cyzicus 9b