Technical Archive

Jaeger-LeCoultre
Duomètre 6086420— lug 20mm

Jaeger-LeCoultre Duomètre 6086420: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Duomètre Sphérotourbillon Moon Platinum / Silver

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Jaeger-LeCoultre 6086420
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

6086420

Movement

Jaeger-LeCoultre caliber 389 Hours, Minutes, Foudroyante Seconds, Additional 24 Hour Hand (adjustable), Small Seconds | Moonphase | Power Reserve Indicator, Tourbillon Escapement

The Heritage

The Jaeger-LeCoultre Duomètre is equipped with the caliber 389 with dual-barrel and tourbillon escapement. The functions include hours, minutes, foudroyante seconds, small seconds, moon phase indication and power reserve. The model features an independently adjustable 24-hour hand.

FAQ

What is the lug width of the Jaeger-LeCoultre Duomètre 6086420?

The Jaeger-LeCoultre Duomètre reference 6086420 is fitted with a 20mm lug width. This measurement is taken with a caliper on the internal distance between the two case lugs, in contact with the strap. All straps with 20mm attachment are compatible with this model.

What is the best strap for the Jaeger-LeCoultre Duomètre 6086420 in platinum?

For a platinum case with tourbillon and flyback chronograph movement, a black or chocolate brown smooth alligator strap represents the most coherent choice with the watch's build quality. Box-grain calf leather that develops patina over time is a refined alternative. Vulcanized rubber of good quality is suitable for occasional sports use.

How do you change the strap on the Jaeger-LeCoultre Duomètre 6086420?

The strap is replaced using a dedicated 20mm spring bar and a strap tool. On a platinum watch of this caliber, it is advisable to entrust the work to a qualified watchmaker or a specialized atelier such as Casati Milano, to avoid scratches on the lugs or damage to the finished surfaces of the case.

Are there aftermarket straps compatible with the Jaeger-LeCoultre Duomètre 6086420?

Yes. Any strap with 20mm attachment and taper toward the buckle compatible with standard length is interchangeable. Milano Straps offers a selection of artisan straps in 20mm size, made to order or available online, suited to the technical and aesthetic profile of the Duomètre 6086420.

How long does a leather strap last on a complex watch like the Duomètre?

A quality alligator or calf strap, with moderate daily use and proper maintenance — drying after moisture contact, storage away from direct light — has an average lifespan of 18–36 months. Casati Milano offers an 18-month warranty on manufacturing defects on all artisan straps.

The next step

The right strap isn’t chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

Request an appointment →

By appointment only · Milan

The atelier's website: casatimilano.com