Watch List notes:

Hostilian, as Caesar, 250-251. Antoninianus (Silver, 22 mm, 4.29 g, 7 h), Rome, 251. C VALENS HOSTIL MES QVINTVS N C Radiate and draped bust of Hostilian to right, seen from behind. Rev. MARTI PROPVGNATORI Mars advancing right, holding spear in his right hand and shield in his left. Cohen 15. RIC 177b. A lustrous, perfect example with a very charming portrait. Virtually as struck.