I. Case

This watch of Jaeger-LeCoultre is stainless steel model. Sized at 39mm, it is a typical size of a men’s dress watch. However, what makes this case special is its thickness or its thinness. Jaeger-LeCoultre’s Mater line has an ultra thin collection that is notorious for its thinness; this Master Ultra Thin Réserve de Marche is only 9.85mm thick despite having date and power-reserve complications. Able to withstand 5 bars of pressure, this watch also contains curled-in lugs that should help with the fitting on wrist. Overall, back casing of this watch is also clean and simple.

II. Back

Coming around to the back side, Master Ultra Thin Réserve de Marche has clear back that reveals the Calibre 938 of Jaeger. On the left is the serial number with the Jaeger-LeCoultre’s “1000 Hours Control” seal. Bottom is the Jaeger-LeCoultre branding with Swiss made logo. Last, on the right, is the 5 bar water-resistance marking with 176.8.38.S reference number. This casing as a whole has a clean aesthetics with high polishing work.

III. Dial, Bezel, and Crown

This dial of Master Ultra Thin Réserve de Marche houses couple of fine watchmaking complications that are elegantly arranged. Réserve de Marche meaning “power reserve” in French, near the 10 o’clock index is the power reserve indicator. This movement of Calibre 938 has a 43 hour power reserve that is depicted by the markings. Near the 2 o’clock index is the date dial that is controlled by the “Corrector C” button above the crown. Last is the small-seconds function near the 6 o’clock index. Dial of this watch is silver finished with sunray-brushed look to it. Indexes are triangle indexes that are rhodium plated. Hands used on the smaller sub-dials are blue hands and the hour and minute hands are dauphine style hands, named after the eldest son of the French king. Moving on, Master Ultra Thin Réserve de Marche has stainless steel domed bezel that is subtle yet elegant. Crown of this Jaeger has its own brand logo on it. First position is to manually wind the watch and second position is to adjust time. To adjust the date dial, Jaeger includes a corrector tool to press on Corrector C button.

IV. Bracelet

Following the simple and organized theme of this dress watch is the black alligator leather strap. Black strap is subtle and would suit the more formal-look well. However, if the included black alligator strap is too boring for your taste, Jaeger also sells Jaeger’s own retail leather products in brown, dark-brown, and dark-grey color scheme for 375USD each. Lastly clasp used on this watch is the double folding deployment buckle with push button. In the end, classic black leather strap adds more formality with the simple silver-colored case.

V. Movement

Movement used on this watch is Jaeger-LeCoultre’s own Calibre 938. This is an automatic movement of Jaeger that is consisted of 273 parts. Also, Calibre 938 contains blued screws with 41 jewels for durability. Outer rim of the rotor is made out of 22k gold with Jaeger-LeCoultre’s “1000 Hours Control” marking on it. “1000 Hours Control” test is the test that every Jaeger watches go through to ensure that the watch is capable of withstanding the daily stresses and strains from use.

VI. Conclusion and Pricing

To sum up, as Jaeger-LeCoultre describes Master Ultra Thin Réserve de Marche as a clean and slender watch that houses ingenious fine watchmaking complications, I completely agree with the statement. Priced at 8,650USD, Master Ultra Thin Réserve de Marche delivers a very clean and lean watch that should suit formal circumstances well.


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