Jaeger-LeCoultre Master Ultra Thin Master Ultra Thin Moon

The case measures 39mm across and 9.9mm thick. Case material: Stainless steel (also gold variants). Case size alone is a poor guide to how a watch wears; lug-to-lug length and how the bracelet drops off the case matter more, which is why we suggest trying one on before you commit.

Automatic, in-house JLC Cal. 925 (moonphase + date). Power reserve is 43 hours. It beats at 28,800 vph.

It is rated to 50 meters, about 164 feet. That covers brief swimming. It is not a dive watch. One caution that applies to every watch on this page: a water resistance figure describes a new watch with fresh gaskets. On a piece that is years past its last service, treat the rating as unknown until it has been pressure tested.

Identified by model designation: Master Ultra Thin Moon, slim dress watch with moonphase and date. Specific Q-number varies by dial/metal/size.. Reading the reference is the fastest way to confirm that a watch is what the seller says it is, before you get anywhere near the movement.

Master Ultra Thin Moon, 39mm, steel. Collector nicknames are not official Jaeger-LeCoultre names, but they are what people actually search for and what they are called across a showroom.

Yes. We buy this reference outright, and we lend against it if you would rather keep it. We are a family-owned San Diego buyer established in 2006, our appraisers are GIA-trained, and the appraisal is complimentary with no obligation to sell. You can bring it to our Gaslamp showroom at 907 Sixth Ave or start online. If you are looking to buy this reference instead, tell us and we will let you know when one comes in.