Experience the refined elegance of the Jaeger-LeCoultre Master Ultra Thin Réserve de Marche 1378420, a masterpiece of horological sophistication. This 39mm stainless steel timepiece features a sleek silver dial with silver-tone hands and stick hour markers, complemented by a sophisticated black alligator leather strap. Powered by the advanced JLC 938 automatic movement with 41 jewels and 273 components, it delivers exceptional precision with a 43-hour power reserve. The watch displays date at 2 o’clock and includes a power reserve indicator, all protected by scratch-resistant sapphire crystal. This 2024 model comes complete with original box, papers, and deployment clasp, representing the pinnacle of Swiss watchmaking excellence for discerning collectors.