Watch List notes:

Probus. AD 276-282. Antoninianus (21mm, 4.38 g, 1h). Siscia mint, 6th officina. 2nd emission, AD 277. Radiate, draped, and cuirassed bust right / Probus and Concordia standing facing one another, clasping hands; ς//XXI. RIC V 657; Alföldi, Siscia V type 26.179; Pink VI/1 p. 36. Good VF, brown surfaces.