Thematic Auction in Geneva:The Evolut...

Hotel Noga Hilton, Geneva, Nov 16, 2002

LOT 45

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.Very important and rare, 18K gold, quarter-repeating à tact self-winding small perpetuelle with 60-hour power reserve.

C. Two-body, "forme collier", the whole engine-turned in à grains d'orge pattern with polished circle on the back cover. D. Enamel, Roman numerals, outer minute track, sunk subsidiary seconds, up-and-down sector at 10 o'clock. Mounted to gilt brass à bate levée ring. Blued steel Breguet hands. M. 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 cmpensation 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 the exit one 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 frk, long fork with banking over the escape wheel arbor with U-shaped end, parachute on top pivot, micrometric screw regulator. Half-ogival platinum weight swinging between two spring-loaded ruby rollers mounted to the case with a stop mechanism triggered when fully wound, Breguet-type repeating mechanism with lifted gathering pallet, all-or-nothing and fixed star wheel, fusee-chain winding, repeating with a single hammer on a short gold in fixed to the case by pull-and-twist piston in the pendan, tone adjustment screw in the bate levée ring.Signed "Breguet" with the serial number on the dial ring and on the dial.Diam. 47 mm.