Strap for Day-Date 40 Platinum / Ice Blue Diagonal Motif

The Rolex Day-Date 40 228206-0004 features a lug width (ansa) of 20mm. This is the horizontal distance between the two suspension lugs located on the sides of the case. Any compatible strap must have exactly this width to ensure proper fitting without gaps or excessive pressure.

Alligator leather remains the natural choice for platinum: its fine grain texture and capacity to develop a mirror-like patina create perfect aesthetic synergy. Shell cordovan offers an almost lacquered density ideal for formal occasions, whilst vegetable-tanned calf is ideal for daily formal wear. The choice depends on intended use and personal colour preference.

Strap replacement requires a specific tool (spring bar tool) to compress the suspension pins and remove them from the case. If you lack experience, we recommend consulting a professional jeweller or Casati Milano, which offers installation service by appointment in Milan. Our straps include detailed instructions and technical support.

Yes, provided the strap has a 20mm lug width. Artisanal straps of superior quality, crafted in alligator, calf or shell cordovan, are fully compatible and represent an aesthetic alternative to the original Oyster strap. They guarantee the same functionality with opportunities for colour and material customisation.

A quality leather strap, subjected to moderate daily use, has an average lifespan of 3–5 years before replacement becomes necessary. Factors such as humidity, perspiration, sun exposure and frequency of use influence longevity. Vegetable-tanned leather straps age with elegance, developing a personal patina. Casati Milano guarantees 18 months against manufacturing defects.