Introducing Jaeger-LeCoultre Master Ultra Thin (ref. 1313520), a distinctive model that balances proportion, precision, and presence. On the wrist, the case feels purposeful: crafted in white gold and measuring 41 mm in diameter, with a thickness of 7.9 mm, defined by a round silhouette. The caseback is open, and the crystal is sapphire, delivering water resistance to 3000 meters. Visually, the face is where character emerges: a silver tone, executed in enamel, framed by stick / dot hour markers, and feuille hands. Mechanically, the watch prioritizes accuracy: the 362 caliber. Initial production year: 2014. The silhouette offers presence without excess, lending confidence in a range of situations. Finishing showcases disciplined attention to detail across facets, edges, and surfaces. For buyers researching specifications and real-world impressions, this reference stands out for coherent design, dependable mechanics, and lasting relevance within modern horology.