Watch List notes:

Gallienus BI Antoninianus. Rome, AD 264/5. GALLIENVS AVG, radiate and cuirassed bust right; countermark: tetrastyle temple / SECVRIT PERPET, Securitas standing to left, leaning on column, holding sceptre; H to right. RIC 280; C. 961; MIR 595w; for countermark cf. Howgego, GIC 286 (Panormus). 2.99g, 22mm, 6h.

Good Fine. Extremely Rare.

From the inventory of a UK dealer.