Rolex
Datejust 31 278289rbr-0006— lug 16mm

The lug width of the Rolex Datejust 31 278289rbr-0006 is exactly 16 millimetres. This width is characteristic of the ladies' Datejust 31 collection and is essential for ensuring compatibility with any aftermarket strap. To verify the measurement, simply remove the original strap and measure the distance between the two lugs of the case using a digital calliper.

The choice depends on usage and aesthetic preferences. For formal wear, alligator in mahogany or black is unbeatable: the geometric grain texture pairs perfectly with white gold and the mother-of-pearl dial. Calf leather offers a finer, more contemporary texture, ideal for those who appreciate understatement. Shell Cordovan guarantees superior durability and luminous patina over time. A NATO strap in grey-blue or cotton-polyester adds versatility and a contemporary twist without compromising elegance.

The strap is changed by removing the spring bars that connect the lugs to the case ears. These spring bars have a central pin which, when slightly depressed, releases the internal spring, allowing the bar to be removed. A specialised tool (spring bar remover) is required, available from jewellers or online. The procedure demands precision to avoid scratching the case. Alternatively, consult a professional watchmaker or Casati Milano, where our craftsmen will perform the change in minutes.

Yes, provided the lug width is precisely 16 millimetres. Aftermarket straps of quality crafted by specialised artisans (such as those from Milano Straps) are fully compatible and often superior to original Rolex straps in terms of flexibility, comfort and aesthetic customisation. It is essential to verify that the strap is fitted with spring bars of the correct size and that the width of the end that adheres to the lugs is perfectly calibrated.

Durability depends on the material, tanning, usage and maintenance. Quality alligator leather with vegetable tanning typically resists 3–4 years of daily wear. Calf leather is slightly less durable, approximately 2–3 years. Shell Cordovan, thanks to its natural density, can exceed 5–6 years. Regular maintenance (cleaning with a dry cloth, avoiding prolonged moisture, occasionally applying a light conditioning product) significantly extends longevity. Casati Milano offers an 18-month warranty against manufacturing defects for all straps handcrafted in the atelier.