Watch List notes:

Hostilian, as Caesar, 250-251. Antoninianus (Silver, 21 mm, 3.73 g, 5 h), Rome, 251. C VALENS HOSTIL MES QVINTVS N C Radiate, draped and cuirassed bust of Hostilian to right. Rev. MARTI PROPVGNATORI Mars advancing right, holding spear and shield. Cohen 15. RIC 177b. Good very fine.