Swiss gold open faced watch with chronograph Circa 1880

Gold lever chronometer with subsidiary seconds
–
A Swiss pocket watch with chronograph and lever chronometer, circa 1880.
This pocket watch has a 18 carat plain pink gold monogrammed case, a white enamel dial with Roman numerals for hours and Arabic for the minutes, subsidiary seconds and decoratively gold hands. The movement is a bridge movement with large gold screw compensation balance and a blued hairspring.
–
Diameter: 51 mm
–
Weight: 110 g
–
Signed: Vacheron & Constantin, Geneva, “Demi Chronomêtre”