Strap for Day-Date 36 Yellow Gold Domed / Oyster / White Roman

The lug width of the Rolex Day-Date 36 118208-0087 is precisely 20.00 mm. This measurement corresponds to the perpendicular distance between the two horns of the case, measured from the inner edge of the upper lug to the inner edge of the lower lug. A compatible strap must feature a lug width of exactly 20 mm to fit without play or excessive tension.

For the 118208-0087 in 18-karat yellow gold, the most suitable straps are in natural alligator leather (Mississippi origin) with finishes in cognac, dark brown, or burgundy, or in vegetable-tanned calf leather. Alligator delivers a fine grain texture and a subtle sheen that complements yellow gold elegantly; vegetable-tanned calf develops a rich patina over time. For warmer seasons, light-coloured calf (cream, beige) is also an excellent choice.

The strap is replaced by extracting the lugs from the case using a specialised tool (spring bar tool) or a fine-pointed instrument. Remove the tension spring from the upper lug, extract the lug, then repeat for the lower lug. Insert the new strap (20 mm width) by aligning the case holes with the strap tubes, then reinstall the tension spring. We recommend entrusting this operation to a qualified watchmaker to prevent damage to the case.

Yes, it is possible to fit a quality aftermarket strap, provided it meets the 20 mm lug width specification and is crafted from noble materials (alligator, calf leather, FKM rubber). A bespoke strap produced by Casati Milano guarantees superior mechanical and aesthetic compatibility. It is essential to verify that the lug width is exactly 20.00 mm to avoid play or instability.

A certified quality alligator leather strap maintains elasticity and structural integrity for 4-5 years of constant daily wear. A vegetable-tanned calf leather strap has a similar lifespan but requires periodic maintenance (hydration, protection from moisture) to preserve patina. Actual lifespan depends on environmental conditions (relative humidity, direct sunlight exposure) and wearing habits. An FKM synthetic rubber strap typically lasts 7-10 years before losing elasticity.