Watch List notes:

Valerian I (253-260). AE Sestertius, Rome mint. Obv. IMP C P LIC VALERIANVS P F AVG. Laureate and cuirassed bust right. Rev. RESTITVTOR ORBIS SC. Valerian standing left, holding spear, raising kneeling female. RIC V 171; C. 186. AE. 16.05 g. 28.00 mm. R. Rare. Superb portrait. Lovely emerald green patina. Good VF/VF.

The woman depicted on reverse is likey the kneeling personification of the orbis terrarum (the entire world), otherwise known as the oikoumenè.