A blue mixed colour twist wine glass, circa 1765 The ogee bowl on a stem containing an opaque white multi-ply corkscrew, with the central and a pair of outer threads in translucent cobalt-blue, alternating with a single mercurial air thread, over a conical foot, 15.6cm high Footnotes: A very similar glass was sold by Bonhams on 19 May 2010, lot 32. For further information on this lot please visit Bonhams.com For further information about this lot please visit the lot listing