Rolex
Datejust 36 116243-0016— lug 20mm

The Rolex Datejust 36 reference 116243-0016 features a lug width of 20 millimetres. This dimension is the standard specification for this two-tone yellow gold and stainless steel model. It is essential to verify that an aftermarket strap is sized precisely at 20mm to ensure both mechanical and aesthetic compatibility with the case lugs.

For a two-tone case of these proportions, an alligator strap of superior quality with vegetable tanning represents the most stylistically coherent choice. Alternatively, structured calf leather offers durability and versatility, whilst shell cordovan is ideal for those who appreciate the evolution of patina over time. A raw canvas NATO strap allows seasonal versatility without compromising elegance.

The operation requires two specialised tools: a spring bar tool and a very small hex key (typically 2mm or 1.5mm). You must first remove the spring bar and then the lugs from the case—a procedure requiring extreme care to avoid scratching the gold. If you lack experience, it is advisable to entrust this operation to a certified Rolex watchmaker or a specialised atelier such as Casati Milano.

Yes, provided the strap has been manufactured specifically for a 20-millimetre lug width and the lug geometry is correct. A high-quality artisanal strap—crafted in alligator, calf or shell cordovan—is not merely compatible but can significantly elevate the aesthetic value of the timepiece. Casati Milano creates bespoke straps calibrated precisely to the proportions of this model.

Durability varies according to material, tanning method and treatment regimen. Superior-quality alligator or calf leather with vegetable tanning typically lasts 4-6 years of daily wear before replacement becomes necessary, owing to robustness and noble ageing capacity. Shell cordovan, being exceptionally noble leather, can endure 7-8 years whilst maintaining aesthetic coherence. The determining factor remains care: avoiding direct water exposure, regular cleaning and application of natural balms significantly extends strap longevity.