Carus AE antoninianus. Cyzicus. 

IMP CM AVR CARVS PF AVG, radiate, draped, cuirassed bust right.
VICTORIA AVG, Victory advancing left, holding wreath and palm.
Officina letter S in exergue.
 
Vienna 63.657; RIC V-2, 120 var (officina letter). Scarce.

With permission of dirtyoldcoins.com
Another known in the Ed's Othila Coins collection.