Watch List notes:

Hostilian. As Caesar, AD 250-251. AR Antoninianus (22mm, 4.19 g, 1h). Rome mint, 5th officina. 7th emission of Trajan Decius, early to mid AD 251. Radiate and draped bust right / Mars advancing right, holding spear and shield. RIC IV 176c (Decius); RSC 13. Lustrous, minor deposits. Good VF.