Swiss gold watch with independent dead centre seconds Circa 1875

Gold open faced lever watch 
–
A fine and rare Swiss, 18K yellow gold, a keyless pocket watch with two-train independent dead-seconds, circa 1875. The back with engraved monogram. Hinged gold cuvette. White enamel dial, radial Roman numerals, outer minute track and outermost Arabic five-minute numerals, subsidiary seconds. Gold spade hands, steel seconds hand. A rhodium-plated movement, two-train with tandem winding, 29 jewels, Geneva striping decoration, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator, independent seconds chronograph with button in the crown for stop/start.
–
Diameter: 53 mm
–
Signed: No Name