A VERY RARE JACOBITE COLOUR TWIST GLASS Circa 1760A VERY RARE JACOBITE COLOUR TWIST GLASSCirca 1760The bell bowl decorated with a six-petalled rose with two buds, one partially open, the reverse with a butterfly, set on a stem enclosing an opaque white multi-ply corkscrew with a brick-red core, edged on one side with cobalt blue and the other in pale green, encircled by a pair of opaque white spiral threads, on a conical foot, 17.4cm high.ProvenanceWith Brayhawks Antiques, Plaxtol, 16 January 2007Basil Jefferies CollectionNotesAccording to Geoffrey B Seddon, The Jacobites and Their Drinking Glasses (1995), the decoration on this glass may be attributed to Engraver F in the author's nomenclature.