Tiffany & Co., Geneva. A rare and very fine 18K gold open face five minute repeating split second chronograph with regulator dial
No. 14990, case inscribed "Weihnachten 1878"
Nickel finished 3/4 plate movement jeweled through the hammers, counterpoised straight line lever escapement, bimetallic balance with overcoiled spring, index regulator, chronograph work with gold train planted on the back plate, split mechanism under dial activated by crown and button on band, repeating on two gongs by means of slide on band, glazed dust cover, white enamel dial with fifth seconds ring enclosing subsidiary hour and seconds dials, blued central minute and chronograph hands, substantial monogrammed 18K gold case, dial, case and movement signed by Tiffany