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

The Rolex Datejust 31 ref. 178344-0027 has a lug width of 16mm. This measurement is specific to the 31mm case size within the Datejust family and requires dedicated straps and buckles, as it differs from the more common 20mm standard.

For a Rolesor case in steel and white gold with a mother-of-pearl dial, a belly-cut alligator strap in vegetable-tanned leather is the most aesthetically coherent choice. Smooth box calf offers a more everyday alternative, whilst shell cordovan suits a minimalist wardrobe. All options must feature a 16mm lug attachment.

Strap replacement requires a double-tipped spring bar tool. The Datejust 31 uses standard Rolex spring bars; it is advisable to use reinforced steel spring bars of 1.8mm diameter to ensure correct retention. The operation takes only a few minutes but should be carried out on a soft surface to avoid scratching the case.

Yes. Aftermarket straps with a 16mm lug width are fully compatible with the Datejust 31 178344-0027, provided they are fitted with spring bars of the correct size. Milano Straps offers a curated selection of handcrafted 16mm straps in various materials, with bespoke customisation available through the Casati Milano atelier.

Longevity depends on the material and usage. A quality vegetable-tanned alligator strap, properly maintained with a leather conditioner every two to three months and rotated with other straps, will retain its structural integrity and appearance for three to five years. Prolonged exposure to perspiration and water accelerates deterioration of the leather fibres.