Quintillus Antoninianus. 270 AD, Rome mint.

Obv: IMP C M AVR CL QVINTILLVS AVG, Radiate, draped bust right.
Rev: APOLLINI CONS, Apollo standing left, holding branch and 
resting hand on lyre on rock. 

CNG (Historical Coins) $37 3/7/04.

RIC 9.

DirtyOldCoins.com, July 2010.