Strap for Datejust 31 Stainless Steel/ Rose Gold / Fluted / Aubergine - Roman / Oyster

The lug width of the Rolex Datejust 31 278271-0019 is 16mm. This width is determined by the lugs integrated into the case and must correspond exactly with the compatible strap. Correct measurement is performed by placing a flexible ruler internally at the lug, from one shoulder to the other. A precise 16mm tolerance ensures secure mounting and ideal visual proportions.

Alligator represents the most versatile and refined choice for the 278271-0019, thanks to its natural grain that dialogues perfectly with the rose gold-steel bi-material aesthetic. Vegetable-tanned calf offers tactile authenticity and develops a patina that ages with dignity. For more casual contexts, NATO fabric straps in cotton-nylon allow rapid transformations without stylistic compromise. Vulcanised rubber is recommended for humid environments or intensive wear.

Strap replacement requires simple tools: a spring bar removal tool or a sharp toothpick. Position the watch on a stable base, insert the tool into the lateral slot of the spring that holds the pin, press gently to release the pin from its seat, then extract the pin. Repeat on the other side. Insert the new strap by aligning the holes with the pins, press until the locking click. If uncertain, Casati Milano offers professional mounting in the atelier or remote consultation.

Yes, provided the strap is manufactured for the 16mm lug width. Quality artisanal aftermarket straps, such as those by Casati Milano, use the same standard Rolex pins and often offer a wider selection of leathers than the official range. Compatibility is guaranteed by lug width: any 16mm strap will fit perfectly on the 278271-0019, allowing you to personalise your watch according to colour preferences and materials.

A fine leather strap, such as alligator with vegetable tanning from Casati Milano, has an average lifespan of 4-6 years with moderate daily use. Longevity depends on environmental humidity, direct sunlight exposure and cleaning frequency. Smooth calf straps typically last 3-4 years before requiring replacement. Casati Milano's warranty covers manufacturing defects for 18 months. With proper maintenance (avoid prolonged immersion, clean with soft damp cloth), the leather ages beautifully whilst maintaining structural functionality even beyond these timeframes.