Watch List notes:

Trebonianus Gallus. A.D. 251-253. AR antoninianus (20.6 mm, 2.00 g, 6 h). Rome mint, Struck A.D. 251-252. Scarce. IMP CC VIB TREB GALLVS PF AVG, radiate, draped and cuirassed bust right / PIETAS AVGG, Pietas standing left, both hands raised, altar at feet left. RIC 41; RSC 84. aVF. 

Ex Baldwins, August, 2002.