Lot of four collar watches in pink or yellow gold (750) comprising : - a collar watch with plain caseback and cutaway sides. Yellow gold (750) dust cover. White enameled dial with hour markers in Roman numerals and chemin de fer for the minutes. Hand-wound mechanical movement. Gross weight: 22.3 g. Case diameter: 3 cm. - a collar watch with case decorated with a medallion of foliage centered on an escutcheon. Dust cover in yellow gold (750). White enameled dial with hour markers in Roman numerals for the hours, chemin de fer and Arabic numerals for the minutes. Hand-wound mechanical movement. Gross weight: 26 g. Case diameter: 3.2 cm. - a collar watch with a case decorated with enameled foliage and flowers centered on an escutcheon. Gilt metal dust cover. White enameled dial with hour markers in Roman numerals, chemin de fer and Arabic numerals for the minutes. Hand-wound mechanical movement. Gross weight : Case diameter: 3.1 cm. - a collar watch with a guilloché case centered on a numbered escutcheon. Gilt metal dust cover. White enameled dial with hour markers in Roman numerals, chemin de fer and Arabic numerals for the minutes. Hand-wound mechanical movement. Gross weight : Case diameter: 3.2 cm. Total gross weight: 103.2 g. Wear, scratches, bumps and loose glass for one.