Strap for Datejust 31 Stainless Steel/ Rose Gold / Diamond / Grey - Roman / Oyster

The Rolex Datejust 31 ref. 278381rbr-0029 has a lug width of 16mm. This measurement refers to the internal distance between the two case lugs and determines compatibility with any aftermarket or original strap. Always verify this measurement with a vernier calliper before purchasing a strap to ensure a precise fit with no lateral play.

For the Datejust 31 ref. 278381rbr-0029 in Everose Rolesor, the most appropriate materials are polished alligator in cognac or tobacco tones — which complement the warmth of the rose gold — and shell cordovan in burgundy for a high-end pairing. Vegetable-tanned calf leather in bordeaux or moss green offers a contemporary alternative with a matte texture. In sporting contexts, slate grey rubber ensures comfort and durability. A deployant clasp completes any pairing with technical coherence.

To replace the strap on the Datejust 31, a dual-tip spring bar tool is required. Insert the fine tip between the lug and the strap, compress the spring bar and slide it out laterally. The procedure requires care to avoid scratching the rose gold lugs. It is advisable to work on a soft surface and apply protective tape to the lugs. Alternatively, Casati Milano offers in-atelier strap fitting by appointment.

Yes. The Datejust 31 278381rbr-0029 with its 16mm lug width is compatible with any aftermarket strap made to this measurement, provided the end-piece curvature is consistent with the Oyster case profile. Milano Straps offers a selection of handcrafted leather, rubber and textile straps specifically cut to 16mm, with curved or straight ends depending on aesthetic preference.

Longevity depends on the material and usage: a quality alligator strap, maintained with specific leather conditioner and kept away from excessive water and perspiration, can accompany the watch for 3 to 5 years whilst retaining its structure and patina. Vegetable-tanned calf leather tends to develop a characteristic wear patina but has a shorter lifespan of approximately 2 to 3 years. Shell cordovan, owing to the density of its fibres, is among the most durable options. The Casati Milano guarantee covers manufacturing defects for 18 months.