Watch List notes:

Hostilian. As Caesar, AD 250-251. AR Antoninianus (23mm, 5.18 g, 6h). Rome mint, 5th officina. 6th-7th emissions of Trajan Decius, AD 251. Radiate and draped bust right / MARTI PROPVGNATORI, Mars advancing right, holding spear and shield. RIC IV 177b; RSC 15. Toned, slightly granular surfaces. VF.

From the Conti Collection.