Allectus - Augustus (usurper) of Imperium Britanniarum from 293 AD to 296 AD
Allectus was a Roman-Britannic usurper-emperor in Britain and northern Gaul from 293 to 296.

Allectus was treasurer to Carausius, a Menapian officer in the Roman navy who had seized power in Britain and northern Gaul in 286. In 293 Carausius was isolated. Allectus assassinated Carausius and assumed command himself.

Allectus was defeated by an expeditionay force led by Constantius Chlorus in 296 AD, although it seems Constantius did not reach Britain until it was all over, and his panegyrist claims he was welcomed by the Britons as a liberator.

Coins of Allectus are fairly scarce, and usually command a price upwards of 100 USD.
Allectus
Emperor (usurper) Allectus of the Britannic Empire

(1) Allectus AD 294-296
Obverse: IMP C ALLECTVS P F AVG, radiate and cuirassed bust right, with decorated shoulder straps
Reverse: LAETITIA AVG, galley right, with mast and six oars; QC in exergue
Ref: RIC 124; Sear 12867
(2) Allectus AD 294-295
Obverse: IMP C ALLECTVS P F AVG, radiate and cuirassed bust right
Reverse: PAX AVG, Pax standing left, holding olive branch and vertical sceptre; S-A across fields, MSL in exergue
Ref: RIC 28; C 31; Sear 13818
(3) Allectus 293-296 AD
Obverse: IMP C ALLECTVS PF AVG, Bust of Allectus facing right, wearing crown and cuirass
Reverse: VIRTVS AVG, Galley rowing left; QC mint mark in exergue
Ref: RIC V Allectus 128