Jaeger-LeCoultre
Master Control Q4138180 (aka: 4138180)— lug 20mm
Jaeger-LeCoultre Master Control Q4138180 (aka: 4138180): 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
Jaeger-LeCoultre Q4138180 (aka: 4138180)The essential strap measurement.
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Selected for the 20mm lug width of the Master Control
FAQ
What is the lug width of the Jaeger-LeCoultre Master Control Q4138180 (4138180)?
The Jaeger-LeCoultre Master Control Q4138180, also known as 4138180, is fitted with a 20mm lug width. This is the internal distance between the case lugs, which can be verified with a caliper: the correct value falls between 19.8mm and 20.0mm. All 20mm straps selected by milanostraps.it meet this tolerance.
What is the best strap for the Jaeger-LeCoultre Master Control Q4138180?
For the Master Control Q4138180, the most suitable materials are Mississippiensis alligator leather with regular grain — ideal for formal occasions — and box-calf leather for those who prefer a more understated aesthetic that develops patina over time. For more sporty or summer use, vulcanized rubber with a textured finish or a nylon NATO represent technically valid and visually coherent alternatives that complement the 40mm steel case.
How do you change the strap on the Jaeger-LeCoultre Master Control Q4138180?
The strap on the Master Control Q4138180 is replaced by acting on the spring bars that connect the strap to the case lugs. With a dedicated flat screwdriver or springbar tool, compress the ends of the bar until it releases from the lug. The operation takes just a few minutes and does not require specialized tools, but it is advisable to perform it on a soft surface to avoid scratches to the case. If in doubt, authorized Jaeger-LeCoultre service centers or a qualified watchmaker can perform the change at no cost.
Are there aftermarket straps compatible with the Jaeger-LeCoultre Master Control Q4138180 (4138180)?
Yes. The Jaeger-LeCoultre Master Control Q4138180 (4138180) features a standard 20mm lug width, which makes a wide range of quality aftermarket straps compatible. milanostraps.it offers a selection of 20mm straps in alligator, calf, NATO, and rubber crafted with materials and finishes consistent with the Manufacture's positioning. For models with slightly curved lugs, curved-end straps are preferable to ensure maximum aesthetic and functional fit.
How long does a leather strap last on the Jaeger-LeCoultre Master Control Q4138180?
The lifespan of a leather strap depends on the quality of the leather, frequency of use, and exposure to perspiration and moisture. A high-quality box-calf strap, with regular use and proper maintenance, typically lasts between 18 and 36 months. An alligator strap tanned using vegetable methods can exceed 3-4 years while maintaining its structure and appearance thanks to the greater density of its fibers. Casati Milano offers an 18-month warranty against manufacturing defects on all bespoke straps made in the Milan atelier.
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