Strap for GMT-Master II Stainless Steel / VTNR / Oyster

The lug width of the GMT-Master 126720VTNR-0001 is 20mm. This width is determined by the geometry of the 40mm case and represents the internal distance between the two lugs where the strap is attached. It is essential to measure this dimension accurately using a digital calliper positioned perpendicularly to the lugs, as even half a millimetre of error will prevent the strap from being mounted securely and in perfect alignment.

For the GMT-Master 126720VTNR-0001, we recommend black alligator or vegetable-tanned calf leather in dark brown tones for formal and business contexts, as they enhance the instrument character of the model whilst maintaining aesthetic restraint. For more versatile daily wear, reddish-brown calf leather creates an elegant dialogue with the 24-hour bezel. For aquatic activities or humid environments, sport rubber straps provide practicality without compromising legibility or functionality.

To change the strap, position the watch with the strap facing downwards and use a dedicated spring bar tool to compress the removable pin from one side, extracting it from the lug. Repeat the operation on the other side. Insert the new strap by aligning the ends with the lugs, compress the pin from the opposite side and ensure it is securely positioned. Verify that the strap is not twisted with respect to the lugs.

Yes, 20mm aftermarket straps are compatible with the GMT-Master 126720VTNR-0001, however the build quality and curvature profile vary significantly. Bespoke handcrafted straps, such as those from Casati Milano, guarantee superior ergonomic fit to Rolex lugs, reducing cracks in the lug holes and ensuring greater longevity. Straps certified by Hermès, Patek Philippe or other luxury brands are compatible but may not offer the same aesthetic customisation.

The lifespan of a leather strap depends on the material, tanning method and intensity of use. A well-maintained alligator or shell cordovan strap lasts typically 5-7 years with moderate daily wear; vegetable-tanned calf leather lasts 3-5 years. A sport rubber strap easily achieves 3-4 years of useful life. Regular maintenance—cleaning with a damp cloth, air drying and occasional application of specific balm—significantly extends the longevity of the strap.