L\'ART DE L\'HORLOGERIE EN FRANCE DE ...
Geneva, Hotel Des Bergues, Nov 14, 1993
Breguet No. 1638, sold to Mr. Casavalencia for the Prince of Prussia, on 14 February 1814, for 2200 Francs. Fine and extremely rare 18 ct. gold watch "à secondes d'un coup", with dual calendar, subsidiary seconds and thermometer, with special escapement.
C. Later four body, "forme quatre baguettes", engine-turned with reeded band, Gold cuvette. D. White enamel with Turkish numerals, subsidiary dial for date and the running seconds with outer ring for days of the week, sector for the thermometer. Gold Breguet hands and counterpoised blued-steel centre-seconds. M. 23"', gilt brass, bar calibre with going-barrel, " échappement naturel", bimetallic three-arm compensation balance with parachute suspension on both pivots, balance spring with terminal curve. Visible typical Breguet dead seconds mechanism with boit in the band. Signed on the dial, cuvette and movement. In very good condition. Diam. 60 mm.