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Trebonianus Gallus, Antoninianus. Milan mint, AD 251-253. 

IMP C C VIB TREB GALLVS AVG, radiate, draped, cuirassed bust right.
PIETAS AVGG, Pietas veiled, standing left by altar, raising both 
hands. 

RIC 72; RSC 88; Sear (1998) 2790; Sear 9643.
Note: Sear 9643 repeats the citations of Sear 9638 ("RIC 71, 
RSC 76, Hunter 51" in error.