Republican Chronometer” French

“Republican Chronometer” French, case No. 970 by Jean Sanguinede, circa 1805. Extremely rare and exceptionally fine 18K gold pair cased pocket chronometer with manual perpetual calendar, Republican calendar, equation of time and solar advance/retard charts, day and date indication, and Louis Berthoud pivoted detent escapement. Outer: Two-body “Etui”, polished, back with monogram. Front with aperture at six to view the dial. Inner: Three-body, "Empire", polished and engine-turned; back with engraved manual perpetual calendar ring, republican calendar ring, equation of time ring and solar advance and retard ring, engine-turned central field with engine-turned floral medallion; front with shuttered winding aperature at 12 which when opened advances the day and date dials one position, engine-turned day and date dials at 2 and 10 with engraved chapters and arrow pointers, aperture at 6 to view the dial, engine-turned ground with polished central field, engine-turned band. Gold, radial Roman hour chapter, outer minute divisions, engine-turned central field. Blued steel “Breguet” hands. Notes This is an exceptional example of the finest work of France's best watchmakers at the turn of the 18th and 19th centuries, both technologically and aesthetically. The case, which is an outstanding example of the casemaker’s art, was crafted by Jean Sanguinede, 39 rue St-Louis, then 18 Quai des Orfèvres, Paris, one of the finest artisans working in France at the time. Early in his care