Trebonianus Gallus AE Sestertius, Rome, AD 251-253. 

Obv: IMP CAES C VIBIVS TREBONIANVS GALLVS AVG, laureate, draped, and cuirassed bust right. 
Rev: AETERNITAS AVGG around, S-C across fields, Aeternitas 
standing left, holding phoenix on globe and raising hem of robe. 

RIC IV 102; Banti 3; Cohen 14; Sear 8664.

With permission of Auktionshaus H. D. Rauch auction 14, Lot 429, Dec. 2013