Swiss gold pocket watch with enamel decoration Circa 1870

A Swiss gold keyless wind pocket watch with enamel decoration by Vacheron & Constantin, circa 1870. Cylinder movement, 3-arm balance. White enamel dial, black Roman numerals, black outer minute track and gilt Gothic hands. 18 Carat open face case, polished hinged, enamel floral decoration to reverse. Signed cuvette and movement.
–
Diameter: 33 mm
–
Signed: Vacheron & Constantin