Strap for Datejust 31 Everose Fluted / President / Silver

The lug width of the Rolex Datejust 31 ref. 178275f-0018 is 16 millimetres, measured between the internal lugs that support the strap. This dimension is standard across all Datejust 31 variants (steel, gold, two-tone). Always verify with a digital calliper before purchasing an aftermarket strap to ensure precise mechanical compatibility.

Alligator is the most contextually coherent choice, thanks to its fine grain that does not clash visually with rose gold. Shell cordovan is highly recommended if you appreciate natural ageing and the development of patina over time. For a less formal approach, vegetable-tanned calf offers naturalness and a subtle texture proportionate to the case's compact dimensions.

The strap is replaced by extracting the spring bars that lock the lug to the case. Use a small wrench or dedicated tool (spring bar tool) to compress the internal spring and slide the bar horizontally out. Position the new strap on the lower lug shoulder, realign the aperture, and reinsert the spring bar until fully locked. If uncertain, consult an authorised Rolex service centre or competent watchmaker to avoid damage to the gold lugs.

Yes, provided they feature a 16mm lug width and meet robust construction standards. Straps in alligator, cordovan, calf and other quality materials are entirely compatible from a mechanical standpoint. We recommend verifying that the strap is supplied with robust spring bars and a buckle (in gold or steel) proportionate to the rose gold case, to maintain aesthetic coherence and durability over time.

A quality leather strap (alligator, shell cordovan, calf), worn daily, maintains mechanical functionality for 4–6 years before requiring replacement. Longevity varies depending on frequency of use, exposure to moisture and perspiration, and maintenance standards (periodic cleaning and conditioning). Visual signs of ageing (patina, natural flexing) begin after 12–18 months, which represents part of the aesthetic sought by those who appreciate natural leathers. Casati Milano offers an 18-month warranty against manufacturing defects and can perform extraordinary maintenance on straps crafted in-atelier.