French gold single handed cylinder pocket watch Circa 1802

Gold and silver cylinder watch by Brequet
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A very fine and rare French, silver and gold, montre de souscription pocket watch with ruby cylinder escapement, circa 1802. Accompanied by a Breguet certificate. Sold to monsieur Malzoff, a Russian officer. An engine-turned band, gold bezels and bow, the engine-turned back cover with a central polished gold disc.
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Silver dial, polished chapter ring with Breguet numerals, outer five-minute, quarter and half-hour divisions, engine-turned centre, secured by a screw. Blued steel souscription hand. A frosted gilt movement, souscription calibre, central barrel winding from the front or back, overhanging ruby cylinder escapement, three-arm gold balance, pare-chute on the top pivot, flat blued steel balance spring, bimetallic temperature compensation curb on the index regulator. Movement signed. 
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Diameter: 62 mm
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Signed: Breguet   Paris
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The silver dial of the present watch would appear to have been exchanged for the original enamel dial shortly after the manufacture of the watch.