Postumus - Augustus (usurper) of Imperium Galliarum from 260 to 269
Marcus Cassianius Latinius Postumus was a Roman commander of provincial origin who ruled as emperor in the west.

The Roman army in Gaul threw off its allegiance to Gallienus around the year 260, and Postumus assumed the title and powers of emperor in the provinces of Gaul, Germania, Britannia and Hispania, thereby founding what scholars have dubbed the Gallic Empire.

Following the victories over Gallienus in 265, the Gallic Empire enjoyed a period of stability. However, in 269 the army in Germania Superior raised a usurper; Laelianus.

Although Postumus was able to capture Mogontiacum and kill Laelianus within a few months, he was unable to control his own troops, who wished to put Mogontiacum to the sack. When Postumus tried to restrain them, his men turned on him and killed him.
Postumus
Emperor (usurper) Postumus of the Gallic Empire

(1) Postumus 260–269 AD
Obverse: IMP C POSTVMVS PF AVG, radiate, draped & cuirassed bust right
Reverse: VICTORIA AVG, Victory walking left, holding wreath and palm, captive at foot
Ref: RIC 89, RSC 377; Sear 10996
(2) Postumus 260-261 A.D.
Obverse: IMP C POSTVMVS PF AVG
Reverse: VICTORIA AVG
Ref: RIC 89
(3) Postumus 262-265 A.D.
Obverse: IMP C POSTVMVS P F AVG, radiate, draped & cuirassed bust right
Reverse: MONETA AVG, Moneta standing left with scales & cornucopiae
Ref: RIC 75
(4) Postumus 259-268 A.D.
Obverse: IMP C POSTVMVS P F AVG, radiate and draped bust right
Reverse: SAECVLI FELICTAS, Postumus standing right with spear & globe
Ref: RIC 83
(5) Postumus 260-261 A.D.
Obverse: IMP C POSTVMVS PF AVG, radiate, draped & cuirassed bust right
Reverse: VICTORIA AVG, Victory walking left, holding wreath and palm, captive at foot.
Ref: RIC 89
(6) Postumus 268 AD
Obverse: IMP C POSTVMVS P F AVG, radiate, draped and cuirassed bust right
Reverse: PAX AVG, Pax standing left, branch in right hand, transverse scepter in left, P in left field
Ref: RIC V 318, SRCV III 10967
(7) Postumus 262 AD
Obverse: IMP C POSTVMVS P F AVG, Bust of Postumus facing right, wearing crown, cuirass, and drapery
Reverse: PM TR P IIII COS III P P, Mars walking right with trophy and transverse spear
Ref: RIC V Postumus 57
(8) Postumus 260 - 269 AD
BL Antoninianus Unknown mint
Obverse: IMP C POSTVMVS P F AVG bust right.
Reverse: Blank
Ref: Mint Error
(9) Postumus 263-265 AD
Obverse: radiate, draped and cuirassed bust right; IMP C POSTVMVS P F AVG
Reverse: Moneta standing left, holding scales and cornucopia; M_ONET_A AVG
Ref: RIC V-II Lyons 75, C 199
(10) Postumus 262 AD
Obverse: radiate draped cuirassed bust right; IMP C POSTVMVS P F AVG
Reverse: Hercules standing left, holding branch and club with lion's skin; HERC_PACIFERO
Ref: RIC V-II Lyons 67; RSC 101; Sear