VACHERON CONSTANTIN CIRCA 1900 Half-savonnette pocket watch in 18K (750) yellow gold. Case: basin-shaped, face with center opening and blue enameled Roman numeral hour markers and chemin de fer minute track, smooth reverse, gold bowl engraved "Nicolas François". Dial: white enamel, painted Roman numeral markers, gilded pear-shaped hands (twisted minute hand), small seconds. Movement: gilt brass, half-chronometer, anchor escapement, compensated bimetallic balance wheel, blued steel Breguet balance spring, pendant winding, N° 260020. Case signed. Numbered 154922 and 260020. Diameter: 49mm Gross weight: 108.02g + 18K gold chain: 12.41g