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All our watches are authenticated and certified by watchmaking experts, guaranteeing their originality and quality. Each piece comes with a certificate of authenticity for total peace of mind.
Each L'Écrin watch comes with a warranty, ensuring its proper functioning and your peace of mind. This protection covers manufacturing defects for impeccable quality.
The case ships your watches by Chronopost and Fedex for fast and secure delivery. In the event of theft or loss, you are covered for the total value of your purchase thanks to our private insurance dedicated to luxury watches.
At the heart of Swiss haute horlogerie, the Jaeger-LeCoultre Master Ultra Slim Power Reserve Q1378420 embodies the spirit of innovation and aesthetic mastery for which the manufacture is renowned. This luxury watch, delivered as a full 2025-unit set, appeals to discerning enthusiasts with its ultra-thin steel silhouette, its refined silver dial, and its signature complication: the power reserve indicator. A perfect balance between modernity and tradition, it is designed for those seeking a technically sophisticated, discreet, and resolutely timeless timepiece, a symbol of Jaeger-LeCoultre's expertise.
The Master Ultra Slim Power Reserve is distinguished by its subtly polished stainless steel case, with a harmonious 39 mm diameter and a remarkable slimness of just 9.85 mm. This carefully considered ergonomics ensures an elegant presence on the wrist, while maintaining exceptional lightness and comfort. The silver dial, with its sunburst finish, offers sophisticated luminosity and highlights the applied baton hour markers and dauphine hands, emblems of Jaeger-LeCoultre's aesthetic purity. The subdials , dedicated to the power reserve and small seconds, are integrated with perfect balance, while the discreetly positioned date window at 2 o'clock provides valuable everyday functionality. The domed sapphire crystal, ultra-scratch-resistant, protects the entire watch with elegance and transparency, revealing the mechanical movement through a transparent case back. A supple and refined black alligator leather strap completes the composition, complemented by a steel folding clasp engraved with the Jaeger-LeCoultre seal.
At the heart of this exceptional timepiece beats the Jaeger-LeCoultre 938/1 automatic caliber, entirely manufactured in the Vallée de Joux. This movement, with its bidirectional winding and 43-hour power reserve, guarantees reliable autonomy and remarkable precision, smoothly powering the hour, minute, small seconds, date, and power reserve functions. A frequency of 28,800 vibrations per hour ensures optimal regularity, while the Côtes de Genève and perlage finishes, visible through the transparent case back, attest to the meticulous attention to detail. Water resistance to 50 meters lends this timepiece considerable robustness, suitable for everyday wear while preserving its brilliance and value.
The Jaeger-LeCoultre Master Ultra Slim Power Reserve Q1378420 stands out for its useful and elegant complication, its ultra-thin design, and its timeless simplicity—all qualities that make it a sought-after luxury watch for connoisseurs. Purchasing this model means investing in an exceptional timepiece from a prestigious manufacturer renowned for its creativity and technical precision. Its aesthetic versatility, blending classicism and modernity, makes it the ideal choice for every occasion, from everyday wear to special events, while affirming a discerning taste for horological excellence.
This example, dated 2025, is offered in mint condition, complete with its full set: Jaeger-LeCoultre box, warranty certificate, booklets, tags, and official accessories. Available immediately in store, it can be collected in person in Geneva, on Rue du Rhône, or shipped securely within Switzerland and internationally.
FAQ
Is the watch certified authentic?
Yes, each piece is guaranteed 100% authentic, delivered with a certificate of guarantee and official Jaeger-LeCoultre accessories.
Is the Jaeger-LeCoultre warranty included?
The watch benefits from the Jaeger-LeCoultre international guarantee, ensuring total peace of mind for the buyer.
What are the delivery options?
Hand delivery in Geneva or secure delivery in Switzerland and internationally according to your preference.
Can I return the watch if it doesn't suit me?
Our terms and conditions include a right of return for a purchase with complete confidence.
How do I care for my Jaeger-LeCoultre Master Ultra Slim?
Regular servicing at an authorized Jaeger-LeCoultre centre is recommended to preserve the precision and beauty of your luxury watch.
