Rolex · GMT-Master

Strap for Rolex GMT-Master 126719BLRO

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter40 mm
Reference126719BLRO
FamilyGMT-Master
MovementRolex caliber 3285 hours, minutes, seconds, Additional 24 hours Hand (adjustable) | date | chronometer

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Straps for the GMT-Master 126719BLRO

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The GMT-Master 126719BLRO, seen from the bench

The GMT-Master reference 126719BLRO is equipped with the automatic Rolex Caliber 3285 chronometer-certified movement, offering hours, minutes, seconds, an adjustable GMT hand, and a date function. The 40mm case is crafted in white gold. The lugs measure 20mm in width.

Frequently asked questions

What is the lug width of the Rolex GMT-Master 126719BLRO?

The lug width of the Rolex GMT-Master 126719BLRO is 20mm. This measurement is determined by the distance between the lugs (the small metal cylinders that attach the strap to the case). The 20mm width is the standard measure for modern 40mm Rolex models and ensures visual harmony between the white gold case and the strap.

Which type of strap is best suited for the GMT-Master 126719BLRO?

For the GMT-Master 126719BLRO, we recommend straps in natural or dyed alligator, which create an elegant aesthetic dialogue with the bicolour Cerachrom bezel. Vegetable-tanned calf leather is excellent for those desiring a textured strap that develops character over time. Translucent shell cordovan offers a sophisticated solution for formal contexts, whilst NATO remains an audacious choice that honours the model's aeronautical heritage.

How do you change the strap on a Rolex GMT-Master?

To change the strap on your Rolex GMT-Master 126719BLRO, remove the lug bars by gently extracting them from the case using a spring bar tool. Once the bars are removed, the strap separates easily. Insert the bars into the new strap's slots and secure them to the case with steady, even pressure until you hear or feel a click. If you prefer not to do this yourself, entrust the task to a professional: a white gold timepiece deserves experienced hands.

Is a 20mm aftermarket strap compatible with the GMT-Master 126719BLRO?

Yes, any strap with a 20mm lug width is mechanically compatible with the GMT-Master 126719BLRO. However, aesthetic compatibility is equally important: the strap must be proportioned to the case diameter (40mm) and capable of supporting the weight of white gold. Artisanal leather straps of superior quality ensure durability and comfort under the weight of a precious timepiece, unlike generic alternatives.

How long does a leather strap last on a Rolex GMT-Master?

The lifespan of a leather strap depends on the material and frequency of use. High-quality vegetable-tanned alligator typically lasts 5–8 years with daily wear, developing a desirable patina over time. Shell cordovan, owing to its natural rigidity, can last up to 10 years. Calf leather, being more delicate, requires regular maintenance and lasts approximately 4–6 years. An artisanal strap backed by a manufacturing defects warranty represents the most discerning choice for an investment piece like the GMT-Master 126719BLRO.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only