A SWISS LATE 18TH CENTURY PAIR CASED POCKET WATCH BY JEAN NICOLAS MENU the signed white enamel dial with Roman numerals, with gold inner case and gilt metal outer case, the highly decorative case set with pearls and cabochon rubies, the high-grade movement with unusual ruby end-stone and rare double verge wheel escapement, 50mm dia., together with a 9ct gold watch chain, each link stamped 375, 42cm long, 41 grams, with watch key. Circa 1790