Strap for Datejust 31 Yellow Gold / Diamond / Black MOP / President

The lug width (also called ansa width) of the Rolex Datejust 31 reference 278288rbr-0032 is exactly 16 millimetres. This measurement is taken between the two attachment points where the strap sits on the case. Accurate verification of this dimension is essential to ensure complete strap compatibility.

For this yellow gold 31mm model, an alligator strap remains the most appropriate choice, particularly in dark shades (black, brown, or burgundy) which create elegant contrast with the precious metal. Alternatively, fine-grained calf leather offers daily versatility, whilst rubber in neutral tones suits summer wear. All straps must measure 16mm lug width.

The Datejust 31 features an integrated deployant clasp system. To remove the strap, open the deployant (located on the back) and carefully slide the strap away from the case lugs. Insert the new 16mm strap into the lugs with firm yet controlled movements, ensuring the deployant closes securely. If uncertain, consult a certified watchmaker.

Yes, any high-quality 16mm strap is compatible with the 278288rbr-0032. We recommend selecting premium materials such as alligator or vegetable-tanned calf to preserve the timepiece's elegance. A bespoke handcrafted strap from Casati Milano guarantees superior finishing, comfort and durability compared to standard alternatives.

Strap longevity depends on usage frequency, climate conditions and tanning quality. With daily wear, a mid-quality alligator or calf strap typically lasts 3–5 years, whilst premium vegetable-tanned leather can reach 7–8 years. Regular maintenance—conditioning the leather and air-drying after perspiration—significantly extends strap lifespan.