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

The lug width of the Rolex Datejust 31 178344-0064 is 16 millimetres. This dimension is specific to the 31 mm Datejust and differs from other models in the collection (the Datejust 36 uses 20 mm lugs). To measure the lug width accurately, position a digital calliper between the two metal pins that connect the strap to the case in the interior zone. This precision is critical to ensure a correct strap replacement without errors.

The Datejust 31 178344-0064, with its two-tone aesthetic and mother-of-pearl dial, pairs perfectly with straps in calf leather or alligator. Fine-grained calf leather in neutral tones (black, dark brown, burgundy) maintains classical elegance without competing with the dial's refinement. For a sportier option, natural alligator with vegetable tanning adds texture and movement. We advise against rubber or fabric straps: they diminish the watch's authority. A waxed leather strap maintains authentic patina and texture over time.

Strap replacement requires two specific tools: a spring bar tool (double-ended pin with spring mechanism) and a non-reflective work surface. Position the watch with the lug facing you, locate the metal pin sustaining the lug and, with the tool, gently press it inward towards the case interior until the internal spring compresses. The pin then releases and you can extract the lug. Insert the new strap by aligning the holes with the pins, press the tool again until you hear the engagement click. Avoid sharp blows: Rolex pins are hardened but fragile if forced.

Yes. Handcrafted straps in vegetable-tanned leather or natural alligator, created by specialised ateliers, exceed the quality of generic online straps. In particular, bespoke 16 mm straps allow hand-stitched visible seaming, customisable deployante and deliberately aged leather. Milano Straps offers a collection of 16 mm straps made to measure at the Casati Milano atelier: you can select the leather directly in the studio, follow each production phase via WhatsApp, and receive an 18-month warranty against manufacturing defects. This option transforms the strap from an interchangeable accessory into an identity component of the watch.

Lifespan depends on tanning, usage and maintenance. A mid-quality calf leather strap has a life of 2-3 years before visible wear signs (cracks, discolouration). A natural alligator strap with vegetable tanning lasts 4-6 years while maintaining aesthetic patina and flexibility. Critical factors: avoid stagnant water (chlorine degrades leather), do not expose to direct heat sources, occasionally apply neutral wax to rehydrate. A museum-quality artisanal strap, like those from Casati Milano, improves with ageing: it develops natural golden patina and unique texture over time, extending the concept of 'durability' beyond mere functional years.