Watch List notes:

Hostilian, As Caesar, AD 250-251. Antoninianus (Silver, 22.5 mm, 3.49 g, 6 h), Struck under Trajan Decius, 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 in right hand and shield in left. Cohen 15. RIC 177b. Bold strike. Very fine.

From the Trausnitz Collection, ex Künker FPL 176, August 2005, 93.