311,500 CHF
The Grand Duc Constantin Nicolaevitch Breguet, No. 23/647, entered into the register on March 10, 1788, sold to an unknown person, bought back from Madame Sanzé, refinished and sold on June 3, 1850 to Monsieur Brocot, horloger, on behalf of His Imperial Highness, Grand Duc Constantin Nicolaevitch of Russia. Accompanied by a certificate. Very important and rare, 18K gold, quarter-repeating à tact self-winding small perpetuelle with 60-hour power reserve. 41.20 mm., gilt brass 3/4 plate, two going barrels, tandem winding with brass wolf-tooth winding gears, four-wheel train, straight-line lever escapement, four-arm steel and platinum, jeweled and capped compensation balance with two screwed quarter-turn lamina segments terminated with a threaded pin at the free end for platinum temperature nuts, two platinum mean-time screws, blued steel helical balance spring with both terminal curves, lift on the pallets, convex entry pallet, concave exit pallet to equalize both lifts, draw, oil retention slots on the escape wheel, single trapezoidal roller table with inserted trapezoidal jewel working between two upright steel pins mounted at the end of the fork, long fork with banking over the escape wheel arbor with U-shaped end, parachute on top pivot, micro-metric screw regulator. Half-oval platinum weight swinging between two spring-loaded ruby rollers mounted to the case with a stop mechanism triggered when fully wound, Breguet-type repeatinmechanism with lifted gathering pallet, a
Auctioneer:
Antiquorum
Date:
2004-04-24
