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

The Rolex Datejust 31 ref. 278344rbr-0027 has a lug width of 16mm. This measurement should be taken with a digital calliper positioned between the two lugs at the strap attachment point. Respecting this dimension is essential to ensure a proper fit with no lateral play.

For the Datejust 31 in white Rolesor, alligator belly in neutral tones or a vegetable-tanned calf leather strap are the most coherent choices given the watch's quality level. For daily or sport use, a 16mm vulcanised rubber strap offers water resistance without compromising aesthetics. A deployant clasp in white gold or steel is ideal for protecting the lugs from stress.

To replace the strap on the Datejust 31, a dedicated Rolex spring bar tool is required. The spring bars are accessed from inside the lugs by applying inward pressure to release them. Precision is essential to avoid scratching the polished or satin-finished lug surfaces. If in doubt, it is advisable to consult a watchmaker or a specialist atelier.

Yes. Aftermarket straps with a 16mm lug width are fully compatible with the Rolex Datejust 31 ref. 278344rbr-0027, provided the end pieces are cut to the correct geometry for the Oyster lug profile. Milano Straps offers a curated range of handcrafted 16mm straps in selected leathers with steel or precious metal buckles, tailored to this specific model.

The lifespan of a leather strap depends on leather quality, frequency of use and exposure to perspiration and moisture. A high-quality alligator or vegetable-tanned calf strap, with proper care, typically lasts between 2 and 4 years of regular wear. Shell cordovan, owing to the compactness of its fibres, tends to last longer and develops a distinguished patina over time. Using a deployant clasp reduces mechanical stress at the attachment point and extends strap longevity.