Discover Jaeger-LeCoultre's precision with the Master Ultra Thin (ref. 1342501), an elegant watch engineered for daily versatility and long-term reliability. From profile to crystal, the architecture convinces: crafted in pink gold and measuring 38 mm in diameter, with a thickness of 4.7 mm, defined by a round silhouette, paired with a gem-set bezel. The caseback is open, and the crystal is sapphire, delivering water resistance to 3000 meters. Up close, the dial rewards inspection: a silver tone, framed by stick / dot hour markers, and feuille hands. Inside, precision takes center stage: the 849A SQ caliber. First released in 2015. Designed for real-world wear, the watch transitions smoothly from tailored looks to casual settings. Manufacturing tolerances and surface treatment highlight consistent quality control. For buyers researching specifications and real-world impressions, this reference stands out for coherent design, dependable mechanics, and lasting relevance within modern horology.