Yellow gold (750) collar watch. White enameled dial, hour markers with Roman numerals for the hours and Arabic numerals and iron track for the minutes, painted in black. Mechanical movement with key winding. The bowl is guilloché, engraved and enameled in black with friezes of florets and a leafy ribbon bow. Countersunk engraved "V de Birot et Martin Tours" and numbered 42093. Gross weight: 22.8 g. - Diameter: 30 mm. Minor chips and a small shock.