Watch List notes:

Probus. Antoninianus; Probus; 276-282 AD, Siscia, Antoninianus, 3.97g. RIC-770 (C), C-647, Alföldi Siscia-76/44. Obv: IMP PROBVS P F AVG Bust radiate, cuirassed r., seen from front. Rx: SOLI INVICTO Sol in quadriga l., XXIV=officina 5 in exergue. From the Philip Ashton Collection, ex Berk 136, 5 February 2004, lot 245. Detailed cuirassed bust with Medusa head and aegis on breast, further fold of aegis on left shoulder, and three pairs of laurel leaves on right shoulder-piece. Rare, cited by Alföldi in only two specimens, Vienna and BM.. MS