 Clipping may have carried on into the middle of the 5th century, or been restricted to the 410s and 420s, and was perhaps carried out as a means of taxation by a government deprived of new supplies of coinage.According to this model, siliquae of a specified weight would have been brought in, clipped, and finally reissued by unit rather than weight.The later 5th and 6th centuries are very murky in almost every way, and coinage is no exception.