3010. Tiffany & Co. A fine 18k gold open face keyless wind chronograph watch with regulator style dial Tiffany & Co. A fine 18K (750) yellow gold open face keyless wind chronograph watch with regulator style dial pendant winding Date: Circa 1880 Movement: 3/4 plate English lever, bi-metallic compensation balance, Breguet overcoil Dial: White enamel, outer Arabic seconds and minute track, subsidiary dials for constant seconds and hour Case: Polished hinged round, polished cuvette, chronograph through pendant Signed: Dial & movement Size: 49mm Weight: 112,63g