Strap for Datejust 31 Stainless Steel Domed Diamond / Jubilee / Aubergine - Roman

The Rolex Datejust 31 reference 278344rbr-0028 features a lug width of 16mm. This measurement is specific to the 31mm case and differs from the 18mm of the Datejust 36 and the 20mm of the Datejust 41. Always verify the internal distance between the lugs with a digital calliper before purchasing an aftermarket strap.

For a white gold case with a diamond-set bezel, a Nile crocodile alligator strap in vegetable-tanned leather with a gloss finish is the most formally coherent choice. Box-calf calfskin offers a versatile alternative for everyday wear. Both pair best with a deployant clasp in polished steel or white gold to maintain aesthetic consistency with the case lugs.

Strap replacement requires a spring bar tool to remove the spring bars securing the strap to the case lugs. It is advisable to work on a watch cushion to avoid scratching the polished surfaces. If you are unfamiliar with the procedure, it is recommended to consult a watchmaker or contact the Casati Milano atelier directly.

Yes, high-quality aftermarket straps are available for the 278344rbr-0028. The key parameter is the 16mm lug width. Milano Straps manufactures straps with tolerances below 0.3mm, ensuring a precise fit between the lugs. Alligator, calfskin and shell cordovan models are available both online and as bespoke commissions at the Casati Milano atelier.

The longevity of a leather strap depends on the hide quality, tanning method and frequency of use. A premium vegetable-tanned alligator strap, properly maintained with periodic conditioning and kept away from water, can last between three and seven years while retaining an impeccable appearance. Box-calf calfskin develops a natural patina over time, an appreciated sign of noble ageing among collectors.