Watch List notes:

Gallienus. A.D. 253-268. AR antoninianus (22.2 mm, 3.71 g, 1 h). Cologne mint, struck A.D. 257-258. GALLIENVS P F AVG, radiate and cuirassed bust of Gallienus right / GERMANICVS MAX V, trophy; bound captive seated to left and right . Göbl 872d; RIC 18; RSC 308. aVF.

Struck to commemorate the victory over the Alemanni at Milan.