18th Century Double Series Opaque Twist Wine Glass c.1760

18th Century opaque twist wine glass with a round funnel bowl. Rests upon a double series opaque twist stem consisting of a pair of spiral tapes outside a multi-ply corkscrew. Conical foot with a snapped pontil. Date & Origin:- England, c1760. Period of George III Historical Context:- Hand-blown around the time the first patent for a one-piece pencil with eraser was issued to American inventor J. Rechendorf of New York City.