Strap for Datejust 31 Stainless Steel/ Rose Gold / Diamond / Chocolate - Roman / Jubilee

The Rolex Datejust 31 reference 278381rbr-0006 features a lug width of precisely 16 millimetres. This dimension is specific to this model and is not compatible with straps designed for 18 mm or 20 mm lugs. To verify the measurement before purchase, remove the existing strap and measure the distance between the internal anchorage points of the case using a digital calliper or millimetre ruler.

For this two-tone reference, three materials are recommended: alligator in cognac or dark brown tones, which enhances the Everose gold through tonal continuity; vegetable-tanned calf leather, which develops patina over time and offers versatile daily wear; shell cordovan, for those seeking constructive durability and decade-long chromatic evolution. Natural rubber strap represents the sports option, ideal for humid environments whilst maintaining formal elegance. Your choice depends on the balance desired between patina preservation and aesthetic development over time.

Changing the strap on a Datejust 31 requires precision to avoid case damage. Firmly grasp the strap itself (not the dial) and pull upward with constant pressure; the spring bars will disengage from their seats in the lugs. Position the new strap by aligning the holes with the spring bars, then press downward until the spring bars click into their seats. Verify that the strap is perfectly centred between the case edges. If the change presents difficulties, consult a professional service to prevent case scratching.

Yes. Due to the standardised 16 mm lug width, the 278381rbr-0006 is compatible with quality aftermarket straps specifically constructed for this width. Milano Straps offers a dedicated collection of 16 mm straps crafted in alligator, calf, shell cordovan and natural rubber, with customisation possibilities through direct leather selection at Casati Milano atelier. Always verify the lug width declared by the manufacturer before purchase.

Strap longevity depends on material and intensity of use. A vegetable-tanned calf strap can remain functional for 3–5 years with moderate daily wear and regular maintenance (drying after humidity exposure, occasional application of natural balms). Alligator typically lasts 5–7 years. Shell cordovan, thanks to material density, can exceed 10–15 years with attentive care. Natural rubber has comparable longevity to calf. In cases of premature deterioration (cracking, loss of water resistance), restoration services are available through Casati Milano.