Rolex
Datejust 31 278289rbr-0021— lug 16mm

The lug width of the Rolex Datejust 31 278289rbr-0021 is 16 millimetres. This measurement represents the distance between the upper and lower lug attachment pins. It is the essential parameter for selecting a compatible strap: any 16mm strap will fit this model perfectly.

For the Datejust 31 in white gold with diamond bezel, American alligator represents the outstanding choice: its natural grain pattern complements the jewelled aesthetic of the case elegantly. Alternatively, Tuscan calf leather with vegetable tanning offers versatility and everyday sophistication, whilst Japanese shell cordovan guarantees a patina that evolves beautifully, becoming increasingly captivating over time.

Changing the strap requires a spring bar tool (a small fork-shaped instrument) to release the attachment pins. Position the watch with the lugs facing towards you, gently insert the tool into the lateral opening of the upper pin until the internal spring compresses, then extract the old strap. Repeat for the lower pin. Inserting the new strap follows the reverse process. To avoid risk, Casati Milano offers in-house strap changes during bespoke commissions.

Yes, provided the strap is designed for a 16mm lug width. Artisanal aftermarket straps, such as those from Milano Straps, often offer superior quality and customisation compared to standard Rolex straps, allowing you to adapt your watch to your personal style without compromising its value or integrity.

A premium leather strap, crafted from noble leathers such as alligator, calf, or shell cordovan, typically lasts 4–6 years with daily wear, particularly with periodic maintenance (leather conditioning). Longevity depends on environmental conditions: humidity and sun exposure accelerate wear, whilst cool, dry storage extends strap lifespan. Casati Milano guarantees 18 months against manufacturing defects.