Rolex
Datejust 31 178243-0067— lug 16mm

The Rolex Datejust 31 ref. 178243-0067 requires a lug width of 16mm. This measurement represents the exact distance between the horizontal pins that attach the strap to the lugs of the case. Any strap with a 16mm lug width will be fully compatible with this two-tone yellow gold and stainless steel model.

Alligator leather represents the most refined and classical choice for the bicolour Datejust 31. The natural texture and lustre of the skin directly echo traditional Swiss watchmaking, amplifying the elegance of yellow gold. Vegetable-tanned calf offers a more versatile alternative, developing a magnificent patina over time. For sportier occasions, a nylon NATO maintains elevated aesthetic standards.

Strap replacement requires removal of the horizontal pins that connect the strap to the lugs. Using a spring bar tool, you compress the pin on one side, allowing extraction. It is advisable to work on a soft, flat surface to avoid scratches on the gold case. If you are uncomfortable performing this operation yourself, a professional watchmaker can complete it in minutes.

Absolutely. An aftermarket strap with 16mm lug width is completely compatible and can significantly enhance both comfort and aesthetics of your timepiece. Specialist craftsmen such as Casati Milano produce straps in premium leather—alligator and calf—with the same constructive care as a luxury watch, allowing you to personalise your Datejust 31 according to your style without compromising quality.

Leather strap durability depends on frequency of wear and material type. High-quality alligator, worn 4–5 days per week under normal conditions, maintains both function and aesthetics for 5–7 years. Natural calf may last 3–5 years before replacement is required. Vegetable-tanned leather tends to age exceptionally well, developing characteristic patina. Moisture and prolonged sun exposure accelerate degradation: storing your Datejust in dry environments significantly extends lifespan.