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Girard-Perregaux celebrates its 225th anniversary this year with several new watches, among them is the La Esmeralda Tourbillon. Girard-Perregaux based the La Esmeralda on an archival piece, a pocket watch with a chronometer-rated Three Bridges tourbillon movement. The original La Esmeralda, with pivoted detent, tourbillon escapement and three gold bridges, won a gold medal at the Universal Exhibition in Paris in 1889. The case of the new La Esmeralda, in 18k pink gold, with a rounded bezel ring and a caseback ring slightly overlapping the middle case band. It measures 44 mm in diameter and houses the automatic Caliber GP09400, with a 14.3-mm-diameter tourbillon carriage and a 10.5-mm-diameter balance wheel. The unique automatic winding system gives a power reserve of at least 60 hours. La Esmeralda is water-resistant to 30 meters and will be produced in limited quantities.