Jaeger-LeCoultre Q378858J Grande Reverso Ultra Thin Duoface Bleu SS Blue Dial

The Jaeger LeCoultre Grande Reverso Ultra Thin Duoface Bleu (ref. Q378858J) is a boutique-exclusive manual-wind icon unveiled in 2013, marrying the storied Reverso heritage with refined dual-time functionality. Its slender rectangular steel case, measuring approximately 27.5 mm by 46.5 mm and just 9.5 mm thick, houses the elegant Caliber 854/1, a hand-wound movement with 180 components, 21 jewels, and a 45‑hour power reserve. The lacquered blue front dial, paired with a silver guilloche reverse featuring a second time zone and day‑night indicator, underscores its travel-ready sophistication. Crafted exclusively for Jaeger‑LeCoultre boutiques, the Bleu edition deepens the Reverso’s ties to polo culture and Argentine craftsmanship through its distinctive Casa Fagliano cordovan leather strap. This Duoface Bleu stands as a collector’s favorite—its technical prowess, boutique rarity, and aesthetic harmony make it a compelling expression of the Reverso’s timeless dual‑time legacy. Like New with Jaeger LeCoultre box and undated papers.