Watch List notes:

Probus, 276-282. Antoninianus (Billon, 21 mm, 3.80 g, 1 h), Siscia, fourth officina, 277. IMP C M AVR PROBVS AVG Radiate and cuirassed bust of Probus to right, seen from the front. Rev. SISCIA PROBI AVG / XXIQ The personification of Siscia seated to left on throne, her torso facing; she holds a long diadem with both hands; to left, the river god Savus (the modern Sava, a tributary of the Danube); to right, the river god Colapis (the modern Kupa, a tributary of the Sava); below, river waters. Alföldi, Siscia V69/4. Cohen 635. RIC 765. A superb example, perfectly centered, sharply struck and with considerable remains of ancient silvering. Good extremely fine.