Watch List notes:

The Roman Empire

Constantine II augustus, 337 – 340. Solidus, Siscia 337-340, AV 4.37 g. CONSTANTI – NVS P F AVG Laurel, rosette-diademed, draped and cuirassed bust r. Rev. GAVDIVM POPVLI ROMANI around wreath inscribed SIC / XX / SIC / XXX. Below, SIS *. C 160. RIC 20. Depeyrot 4/2.
Almost invisible marks, otherwise virtually as struck and almost Fdc
Privately purchased from Vinchon in 1961. From the Pierre Bastien collection.