Strap for Day-Date 36 Yellow Gold / Strap / Black Computer Diamonds

The lug width of the Day-Date 36 reference 118138-0018 is 20mm. This measurement must be verified using a digital calliper, measuring the distance between the inner shoulders of the lugs, to ensure the aftermarket strap is perfectly compatible without lateral overhang.

For the Day-Date 36 118138-0018 in yellow gold, natural alligator remains the most coherent choice: the scale texture, microscopic grain and characteristic suppleness ensure aesthetic harmony with the precious case. Alternatively, vegetable-tanned calf offers an evolving patina over time, or a vulcanised rubber strap for practical daily wear.

Strap replacement requires extraction of the spring bars that connect the strap to the lugs. Use a dedicated spring bar tool to release the bars, remove the worn strap and insert the new one with precision on the bars. It is recommended to consult an expert to avoid damage to the case, or rely on Casati Milano's atelier service by appointment.

Yes, provided the strap has a certified 20mm lug width. Quality artisanal aftermarket straps, such as those produced by Casati Milano, guarantee perfect compatibility with the Day-Date 36 reference 118138-0018 while maintaining the original spring bars. Warranty covers manufacturing defects for 18 months.

A premium leather strap, such as alligator or vegetable-tanned calf, typically lasts 3–5 years of regular use, varying according to intensity of wear and environmental exposure. Vegetable-tanned leather develops a fascinating patina over time, extending aesthetic appreciation beyond mechanical wear. Vulcanised rubber typically lasts 2–3 years before replacement is necessary.