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.

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Reverse: LAETITIA AVG, galley right, with mast and six oars; QC in exergue
Die Orientation: 6 H
Weight: 2.7 g
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Reverse: VIRTVS AVG, Galley rowing left; QC mint mark in exergue
Die Orientation: 12 H
Weight: 2.23 g
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Reverse: VIRTVS AVG, galley left, with mast and five oars; QL in exergue
Die Orientation: 6 H
Weight: 2.58 g
Roma Numismatics Auction XIX; Lot 910, Ex. Frank Reinhardt Collection; Bt. Marc Walter Ancient Coins, 2017; Ex. H.D. Rauch Auction 102 (2016); Lot 513, Ex. Bankhaus Aufhäuser Auktion 11 (1995); Lot 420
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Reverse: PROVID AVG, Providentia standing left, holding globe and cornucopia; S-P across fields, C in exergue
Die Orientation: 6 H
Weight: 3.19 g