Strap for Datejust 31 Rolesor Yellow Fluted / Jubilee / Champagne Diamond

The Rolex Datejust 31 178273-0002 features a lug width of 16mm. This measurement is taken between the two spring bars protruding from the case at the 12 and 6 o'clock positions. It is essential to verify this measurement before purchasing an aftermarket strap, as different Datejust models or vintage references may require 14mm, 15mm, 18mm, or 20mm widths. A 16mm strap will not fit correctly on a case with a different lug width.

Alligator leather in dark brown or cognac represents the natural choice for the two-tone Datejust 31. The regular grain pattern of alligator does not compete visually with the yellow gold and steel case, allowing case details to retain prominence. Alternatively, vegetable-tanned European calf leather develops a natural patina over time that evolves harmoniously with metal aging. For those preferring lighter texture, smooth calf leather in beige or cognac tones offers elegance without visual bulk.

The Datejust 31 uses removable spring bars fastened to the case through elastic or fixed pins. To remove the strap, grip the watch securely and use a thin tool—such as a dedicated spring bar tool or precision screwdriver—to gently press the pin from outside inward, sliding it free. Once the pin is extracted, the strap detaches easily. Reverse the procedure to install the new strap, ensuring the pin is fully seated and the strap has no lateral play. If you lack experience, Casati Milano can execute the change by hand during an atelier visit.

Yes, a high-quality aftermarket alligator strap is fully compatible, provided the lug width is precisely 16mm. Artisanal straps crafted by specialised tanneries such as Casati Milano often surpass original Rolex strap quality, offering personalised leather selection, yellow gold or stainless steel finishing, and bespoke deployant clasps. Compatibility is guaranteed by spring bar standardisation: any 16mm strap will install correctly. We recommend choosing reputable tanneries offering production defect warranties.

Natural leather strap lifespan ranges from 3 to 7 years with daily use, depending on usage patterns, climate, tanning method, and maintenance. A vegetable-tanned leather, treated regularly with specialist balms and protected from excessive moisture, tends toward the upper end of this range. Alligator, being denser and more resilient, typically outlasts calf leather. Factors such as frequent bathing, intensive perspiration, or prolonged sun exposure accelerate aging. Casati Milano provides an 18-month warranty on production defects and offers strap regeneration or replacement services.