Watch List notes:

Quintillus. AD 270. Antoninianus (20mm, 2.49 g, 6h). Mediolanum (Milan) mint. 1st emission, circa end August-November. IMP QVINTILLVS AVG, radiate, draped, and cuirassed bust right / MAR TI P ACI, Mars standing left, holding branch and spear; P. RIC V Online 1111; RIC V 59 var. (bust type); Huvelin 16-21; Toffanin 343/2. Traces of toned silvering, flan crack. Near EF.

From the Conti Collection.