Collar watch in yellow gold (750), cover with guilloché decoration enhanced with black enamel and numbered AB. White enamel dial, hour markers with black-painted Roman numerals, Arabic numerals for minutes and baton markers for seconds. Mechanical movement with key winding. Yellow gold (750) dust cover numbered 12823. Gross weight: 25.3 g. - Diameter: 30 mm. Damage to bezel, glass to be refastened, with key.