AN ENGRAVED AIRTWIST WINE-GLASS, the bell bowl with a border of foliage-scrolls and stylised flowers, the stem with a pair of entwined two-ply spirals above a conical foot, 16.5cm. high; a mercury-twist wine-glass of drawn-trumpet shape, on a conical foot, 15.7cm. high, circa 1750; and a mixed-twist flute of trumpet shape, on a conical foot (chip and related crack to footrim), circa 1765, 19cm. high (3)