Quintillus, AE antoninianus. Rome mint. 

IMP CM AVR CL QVINTILLVS AVG, radiate, cuirassed bust right.
SECVRIT AVG, Securitas standing left, legs crossed,
leaning on column and holding short sceptre. XI in right
field.

RIC V-1 Rome 31.

Stack's Bowers and Ponterio - Sale 185 - August 2014