Strap for Day-Date 36 Yellow Gold - Fluted / Carnelian / President

The lug width (case spacing) of the Day-Date 36 128238-0088 is precisely 20mm. This is the internal distance between the case lugs. It is essential to verify this specification when purchasing an aftermarket strap, as an incorrect lug width (such as 19mm or 21mm) will not fit properly and may result in cosmetic or functional issues.

Alligator leather represents the most coherent choice for this watch's formal aesthetic. The natural grain and subtle sheen pair perfectly with yellow gold and the Champagne dial. Alternatively, vegetable-tanned calf leather offers evolving patina over time, whilst shell cordovan delivers extraordinary durability. For more casual-sporty contexts, a heavy-cotton NATO maintains authority without stiffness.

Strap replacement requires a specialised tool to depress the spring bars. Place the watch on a soft surface (microfibre cloth), locate the small holes at the lug ends, insert the spring bar tool to press the pin inward, remove the old strap, and fit the new one. This is a delicate operation that we recommend entrusting to a professional to avoid scratching the case.

Yes, all straps specifically designed for 20mm lug width are compatible with the 128238-0088, regardless of manufacturer. However, quality varies significantly. We recommend straps crafted from premium leathers (alligator, vegetable-tanned calf) with precise finishing. Casati Milano produces bespoke straps for this model, overseeing each construction phase directly.

A quality leather strap (alligator or vegetable-tanned calf) typically lasts 3–5 years with daily wear, gradually stretching naturally. Shell cordovan can endure 7–10 years. Longevity depends on exposure to moisture, perspiration, direct sunlight, and frequency of use. A sports-grade FKM rubber strap lasts longer (5–7 years) but offers less aesthetic versatility. Casati Milano provides an 18-month warranty against manufacturing defects.