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

The GMT-Master reference 126710GRNR-0004 features a 20-millimetre lug width. This specification is invariable across all examples of this model and corresponds to the distance between the case attachment points where the strap secures. A 20mm strap positions correctly without gaps or excessive tension.

There is no universally "best" material, but rather functional choices. Vegetable-tanned alligator offers elegance and a naturally evolving patina over time. Shell cordovan guarantees robustness and inherent water resistance. Calf leather suits extended daily wear due to its suppleness. Technical straps (NATO, rubber) are reserved for extreme conditions where environmental resistance takes precedence over aesthetics.

The GMT-Master employs fastening screws on the lugs. Using a small Phillips screwdriver (or dedicated Rolex tool), loosen the screws inside the lugs, extract the old strap, and insert the new one, ensuring the passants align perfectly with the case seats. Screw tension should be firm but not excessive to avoid case damage.

Yes, provided they are certified 20mm. Any strap with 20mm lugs (alligator, calf, shell cordovan, rubber) is mechanically compatible. Aesthetic quality and durability depend on manufacturing and material choice, not physical compatibility.

A vegan leather strap with moderate daily use lasts 18–24 months. Artisan vegetable-tanned alligator resists 24–36 months before replacement is advisable. Shell cordovan can reach 36–48 months due to superior density. Visible wear (leather thinning, creasing) is a natural sign of ageing, not a manufacturing defect.