Strap for Datejust 31 Stainless Steel Domed Diamond / Jubilee / Pink - Diamond

The lug width of the Rolex Datejust 31 278344RBR-0034 is 16mm. This measurement refers to the internal distance between the two lugs at the point where the strap attaches to the case. It is a model-specific dimension that must be respected to ensure correct fitment and proportionate aesthetics.

For the Datejust 31 in white gold with a diamond-set bezel, a vegetable-tanned alligator strap with a polished finish is the most coherent choice given the material hierarchy of the case. Alternatively, smooth box-calf leather offers understated elegance, while shell cordovan adds character. A deployant clasp in white gold or silver PVD completes the pairing whilst maintaining metallic consistency with the case.

The Datejust 31 uses a standard 16mm spring bar system. To replace the strap, a spring bar tool is used to compress and release the bars from the lugs. The process is fully reversible and requires no watchmaking intervention. It is nonetheless advisable to use high-quality spring bars and, if in doubt, to have the operation carried out by a watchmaker to avoid scratching the white gold case.

Yes, a wide range of aftermarket straps are available for a 16mm lug width. Milano Straps offers a curated selection of handcrafted leather, alligator, cordovan and NATO straps made specifically for this size. It is important to confirm the lug width is exactly 16mm and that the strap's end curvature suits the Datejust 31 case profile for optimal fit.

The lifespan of a leather strap depends on material quality and daily wear conditions. A high-quality vegetable-tanned alligator or box-calf strap, properly maintained — kept away from prolonged exposure to water and perspiration, and conditioned regularly — can last between three and five years whilst retaining a well-kept appearance. Milano Straps products carry an 18-month manufacturing defect warranty.