2025 Jaeger-LeCoultre Master Ultra Thin Reserve De Marche Q1378421 39mm

What do we have here?


A great example of a JLC Master Ultra Thin Reserve De Marche, ref Q1378421, with a 39mm stainless steel case fitted to a leather JLC strap and matching JLC double folding buckle. This Master Ultra Thin features a silver dial that is complemented nicely by applied rhodium-plated hour-markers, a guilloché date subdial at 2 o’clock, a guilloché small seconds subdial at 6 o’clock, and a “réserve de marche” indicator at 10 o’clock. This watch features an exhibition caseback showcasing the movement & the gold rotor.


This Master Ultra Thin is in good condition with light signs of wear throughout. It comes with inner and outer boxes, setting stylus, user manual and warranty card dated 2025. Contact us for more info, photos, or to make this watch yours!  




Brand: Jaeger-LeCoultre
Model: Master Ultra Thin Reserve De Marche
Reference: Q1378421
Case Material: steel
Bracelet Material: crocodile skin
Size: 39mm
Dial Color: silver
Bezel Material: steel
Date: 2025
Condition: Pre-owned
Included Items: Watch with original box and papers
Movement: Automatic
Water Resistance: Up to 50m


Stock ID: 764KP