Watch List notes:

Claudius II Gothicus (268-270). BI (heavy) Antoninianus, Rome mint. Obv. IMP C CLAVDIVS AVG. Radiate and cuirassed bust right. Rev. SALVS AVG. Salus standing left, holding sceptre and feeding serpent rising from altar. RIC V 98. BI. 5.82 g. 24.50 mm. RR. Green-brown patina. VF.

Struck on an exceptionally oversized and overweight flan; probably an as ?.