Quintillus, AE antoninianus. Rome mint.

IMP CM AVR CL QVINTILLVS AVG, radiate, cuirassed bust right.
MARTI PACIF, Mars walking left, holding branch, transverse 
spear (point upwards) and small round shield.
X in left field.
Appleshaw hoard 308; RIC V-1 Rome 24 var (bust type)
Very rare.

With permission of Pegasi Numismatics Auction 140, lot 413. August 2011.