AN ENGRAVED MERCURY-TWIST WINE-GLASS, the pan-topped bowl with stylised flowering foliage, the stem with two entwined corkscrew spirals above a conical foot, 15.5cm. high, circa 1750; a balustroid wine-glass with a funnel bowl supported on a collar above a plain stem and folded conical foot, circa 1740, 16cm. high; and an engraved plain-stemmed wine-glass of drawn-trumpet shape, the bowl with a branch of fruiting-vine, on a conical foot, mid-18th century, 17cm. high (3)