Strap for Datejust 31 Stainless Steel Domed Diamond / Oyster / MOP

The lug width of the Rolex Datejust 31 ref. 278344RBR-0005 is 16 mm. This measurement represents the distance between the two attachment points on the case where the strap is mounted. It is essential to verify this dimension before purchasing a compatible strap, as an incorrect lug width would compromise the fitting and stability of the strap on the wrist.

For the Datejust 31 ref. 278344RBR-0005, alligator (particularly in pearl grey or natural white tones, which harmonises with the mother-of-pearl dial), vegetable-tanned calf (for a vintage-contemporary effect that complements the white gold), and shell cordovan in burgundy or bordeaux (for superior durability and a patina that evolves naturally) are particularly suitable. Rubber straps are not recommended for this model, as they would compromise the aesthetic balance of the two-tone case.

Changing the strap on a Rolex Datejust 31 requires a spring bar tool (a small tool with two flat ends). Place the watch on a flat surface, insert one end of the spring bar tool into the groove at the side of the lug, gently compress the internal spring and slide downward to release the previous strap attachment. Repeat on the other side. Insert the new strap in the same manner, ensuring that the spring bars are securely fixed in both positions. If you prefer to avoid any risk, consult an authorised Rolex jeweller or a specialist strap atelier such as Casati Milano.

Yes. Provided the strap is constructed for a 16 mm lug width and manufactured with excellent materials (alligator, vegetable-tanned calf, shell cordovan), an artisanal aftermarket strap is completely compatible with the Datejust 31 ref. 278344RBR-0005. What matters is that the spring bar holes are precisely engineered and that the strap profile is proportioned to the delicate dimensions of the case (31 mm diameter). A bespoke strap, such as those created by Casati Milano, furthermore offers the opportunity to fully personalise the craftsmanship and material according to your aesthetic preferences.

The lifespan of a leather strap depends on the material, daily use and maintenance. High-quality alligator, vegetable-tanned, can last 3-5 years of regular use before replacement is needed, thanks to its denser fibre structure. Vegetable-tanned calf, being softer, generally lasts 2-4 years. Shell cordovan, being extremely dense, can exceed 5 years even with intensive use. To extend longevity, avoid prolonged exposure to direct moisture, clean periodically with a dry cloth and do not force the deployante clasp during wear. An artisanal strap made with traditional techniques ages more elegantly than an industrial one and can often be restored rather than completely replaced.