Jaeger-LeCoultre Master Ultra Thin Reserve de Marche Q1372520 Luxury Watch Review

4,439 views · Published 13 February 2015 · 8:08 · Indexed 10 November 2026

Channel: The 1916 Company · 2015 · Howto & Style

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Jaeger-LeCoultre is no stranger to the automatic watch/power reserve combo. Since 1948, this tandem has been a specialty of the manufacture from Le Sentier, and the new Jaeger-LeCoultre Master Ultra-Thin Reserve de Marche takes tradition to the next level.

Introduced in 2012, the newest generation of JLC Master Ultra Thin cases combine serious refinement with equal measures of substance. While the old-school JLC "Powermatic" power reserve models of the Ike Era measure 31-36mm, the modern Jaeger-LeCoultre Master Ultra Thin Reserve de Marche enters the 21st century with broad-shouldered authority.  

Less than 10mm thick, the wrist presence of this watch is elegant but never quaint; a 39mm diameter ensures that nobody mistakes this modern marvel for a petite vintage bauble.

Jaeger-LeCoultre's caliber 938 features all of the hallmarks of a manufacture par excellence; ceramic rotor bearings; high-efficiency unidirectional winding; sub-5mm thickness, and laser-welded hairspring. It's fine, slim, and still everyday tough; think Karen Allen in "Raiders of the Lost Ark," and you get the idea.

JLC's Reserve de March took a huge aesthetic leap forward with the Ultra Thin model. The 2000s were a sober and sterile time for the RDM; it's ice-cold combination of steel and silvered dial felt downright chilly for a dress model. No more; the new Master Ultra Thin Reserve de Marche endears itself to the user with an off-white eggshell dial and delicate 18-karat rose gold case that are as warm as hot cocoa at an Alpine ski lodge.

And JLC adds marshmallows; the power reserve gauge, radial date, and small seconds provide both calculated asymmetry and real utility to the owner. Short of the hours and minutes, is there any more pertinent info to the user of a watch than seconds, date, or hours of movement function remaining?

See this Jaeger-LeCoultre Master Ultra Thin Reserve de Marche on www.thewatchbox.com with a full set of Jaeger-LeCoultre factory accessories. Video and content by Tim Mosso.

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