Jaeger-LeCoultre Master Ultra Thin Power Reserve automatic 39 mm Full Set NOS

The Master Ultra Thin collection from Jaeger-LeCoultre

The Master Ultra Thin collection embodies Jaeger-LeCoultre's quest for purity and aesthetic refinement. Featuring sleek lines and extra-flat cases, this collection perfectly illustrates the understated elegance of the Maison. Behind this sobriety lies a remarkable technicality, true to the spirit of innovation that has driven the Manufacture since its foundation in 1833 in the heart of the Vallée de Joux. Each Master Ultra Thin model is a demonstration of watchmaking expertise in a sober, timeless silhouette, ideal for classic yet discerning watch lovers.

The model:

Reference Q1378420 offers a refined, functional interpretation of the classic extra-flat watch. With a steel case measuring 39 mm in diameter and a contained thickness of just 9.85 mm, this watch captivates with its perfect balance of elegance and legibility.

Its opaline silver dial features a harmonious configuration of complications: a power reserve indicator at 10 o'clock, a pointer-type date display at 2 o'clock, and a small seconds at 6 o'clock. Faceted dauphine hands and applied hour-markers contribute to the sophisticated sobriety of the whole. The whole rests on a black alligator leather strap with folding clasp, which underlines the classic, dressy character of the piece.

The movement

The watch is powered by the Jaeger-LeCoultre Calibre 938, a self-winding mechanical movement entirely developed and assembled by the Manufacture. It offers a 43-hour power reserve and is distinguished by its finesse and wealth of complications in such a slim case. Visible through the transparent sapphire caseback, the movement reveals a meticulous finish with côtes de Genève, blued screws and circular graining, testimony to Jaeger-LeCoultre's high level of craftsmanship.

The package

This Jaeger-LeCoultre Master Ultra Thin Power Reserve is a NOS (New Old Stock) model, in perfect condition and working perfectly. It is delivered with its case and all its documents. It also comes with an eight-year Jaeger-LeCoultre warranty.