Watch List notes:

Hostilian, as Caesar, 250-251. Antoninianus (Silver, 22 mm, 3.78 g, 12 h), Rome. C VALENS HOSTIL MES QVINTVS N C Radiate and draped bust of Hostilian to right, seen from behind. Rev. CONCORDIA AVGG Clasped right hands. Cohen 6. RIC 174b. Rare. About extremely fine.