Watch List notes:

Gallienus. AD 253-268. AR Antoninianus (19mm, 2.94 g, 7h). Mediolanum (Milan) mint. 6th emission, AD 266. Radiate and cuirassed bust left, holding spear and shield / Aesculapius standing facing, head left, resting serpent-entwined staff on ground; P. RIC V 511 var. (bust type); MIR 36, 1286a-k var. (same); RSC –; Holmes Collection (CNG E-442), lot 450 (same obv. die; hammer $1000). Minor spots of rougnhess. Good VF. Very rare bust type.