THE ART OF BREGUET
Geneva, Hotel Des Bergues, Apr 14, 1991
A Monsieur de Castellane "Perpétuelle" watch No.26, sold on 27 February 1792, for the sum of 3300 Francs. Gold self-winding watch, with "à toc" quarterrepeating and winding indicator, constructed on the principals of the "garde-temps".
Case: 20 ct., polished, two body, by Mermillod,
typical of the first series of perpétuelle watches.
Dial: White enamel, by Droz, signed: "Breguet", with Breguet numerals, five-minute divisions marked by fleur de lys, the minutes by small stars, subsidiary seconds and a sector for the up-anddown scale calibrated to 60 hours. Blued-steel Breguet hands.
Movement: Gilt brass, 19.5"', signed on the edge of the dial plate: "Inventé par Breguet à Paris, No. 26", full plate caliber, the back relieved for the escapement, two barrels wound automatically by an oscillating platinum weight of ogival form and pivoted on the edge of the back plate. The weight locked by a rising pawl when fully wound, the arc limiting spring fitted to the edge of the case. Fivewheel train, unjewelled, with an intermediate wheel to provide a 60 hour going period. Experimental lateral lever escapement, without draw, with gold lever, steel pallets with enclosed pallet jewels, and double roller with integral arc limiting slots, additional banking pins mounted on the watch plate. Arnold type two-arm bimetallic compensation balance with the adjusting weights threaded onto the ends of the rim. Blued-steel flat balance spring with micrometer regulator adjustable through the edge of the dial plate. The seconds hand can be unclutched at-will for exact time setting by means of a push-pin through the edge of the dial plate. Dumb repeating on the case with a single hammer by depressing the pendant.
In very good condition. Diam. 53 mm.