Unsigned. A fine 18K gold and enamel openface two train-minute petite sonnerie cylinder clock watch

Unsigned. A fine 18K gold and enamel openface two train-minute petite sonnerie cylinder clock watch
Unsigned, cuvette bearing the signature Breguet, Horloger de la Marine Royale a Paris, No. 15'278, circa 1835
With gilt-finished two-train cylinder movement, en passant hour and half-hour striking on one polished steel hammer onto a gong, gold cuvette, the engine-turned silver dial with Roman numerals on blank chapter ring, in finely scroll and foliage black champlevé enamel decorated case, pendant and bow, N/S (not/striking) lever underneath the bezel, unsigned
56 mm. diam.