TREBONIANUS GALLUS
AD 251-253
AR Antoninianus. 3.02g, 23mm
MINTED: Rome mint, AD 251-252
REF: RIC 33
OBVERSE: IMP CAE C VIB TREBONIANVS AVG, radiate, draped, cuirassed bust right.
REVERSE: FELICITAS PVBLICA. Felicitas standing left, holding long caduceus and cornucopia.

Notes: 
Dark find patina, with a few spots of green hoard deposits.  
The slightly ragged section of the coin's edge is an interesting artifact of the ancient minting process, where blanks were made as part of a casting chain/tree, with each blank linked by a narrow channel.  Sometimes, blanks were inexpertly broken off as they were prepared for striking, leaving either a protruding sprue or a ragged edge.  While the edges could then have been smoothened, in some cases, they were simply left alone.  
 
Historical Notes:
Trebonianus Gallus was a senator and general who had accompanied Emperor Trajan Decius on his ill-fated campaign against an army of invading Goths.  When Decius fell in battle , what was left of the decimated Roman legions declared Gallus the new emperor.  Returning to Rome, Gallus accepted his predecessor's son Hostilian as co-emperor, and gave his own son Volusian the title of Caesar.  Gallus's brief reign was troubled by numerous rebellions and invasions, and support for his regime rapidly eroded.  In 253, Gallus and Volusian marched to put down the revolt of Aemilian, the governor of Moesia Superior and Pannonia. They had summoned the German legions under the future emperor Valerian to support them, but before Valerian could arrive, Gallus's own soldiers turned against him and murdered both him and Volusian.