Watch List notes:

Trebonianus Gallus, 251-253. Sestertius (Orichalcum, 28 mm, 16.23 g, 6 h), Rome. IMP CAES C VIBIVS TREBONIANVS GALLVS AVG Laureate, draped and cuirassed bust of Trebonianus Gallus to right, seen from behind. Rev. SALVS AVGG / S - C Salus standing right, feeding serpent from patera. Cohen 115. RIC 121a. An unusually complete example with a fine green patina. The reverse somewhat weakly struck, otherwise, about extremely fine.