Quintillus Antoninianus, 270 AD, Antoninianus, Rome mint. 

IMP CM AVR CL QVINTILLVS AVG, radiate, draped bust right
FORTVNA REDVX, Fortuna standing left holding rudder on globe and cornucopiae, 
Z in right field. 

Cohen 32; Sear 11441.

Using reverse of his brother Claudius II, according to Goebl.