Strap for Datejust 31 Stainless Steel Fluted / Oyster / Meteorite

The lug width of the Rolex Datejust 31 178274-0059 is 16mm. This specification is critical when selecting a compatible strap: 18mm or 20mm straps will not fit correctly on the case lugs. Always specify 16mm when commissioning a bespoke strap to ensure perfect integration with the case.

Alligator in vegetable tanning—black or dark brown—is the aesthetic choice: the leather's grain dialogue with the Widmanstätten crystallisations of the meteorite. Alternatively, shell cordovan in deep burgundy or anthracite grey develops profound patina and ages in parallel with the dial. We always recommend natural leather straps, never synthetic, to honour the rarity of this timepiece.

The Datejust 31 uses two spring bars that secure the strap to the case lugs. To change the strap: gently remove the spring bars using a dedicated spring bar tool, withdraw the old strap, align the new strap's holes with the lugs, and press the spring bar until it locks into position. If uncertain, consult a watchmaker or use Casati Milano's bespoke service.

Yes, provided the lug width is precisely 16mm and the strap is manufactured for this specific measurement. Bespoke artisanal straps in alligator, cordovan, or calf leather are fully compatible with the Datejust 31. Always verify that the strap has been constructed for 16mm lugs, not alternative sizes.

A high-quality natural leather strap (alligator, shell cordovan, calf) typically lasts 3–5 years under moderate daily wear. Longevity depends on exposure to moisture, perspiration, and sunlight. An artisanal vegetable-tanned strap ages elegantly, developing patina and character. With regular maintenance—cleaning, drying—longevity increases significantly. Casati Milano provides an 18-month warranty against manufacturing defects.