Strap for Day-Date 36 White Gold / Strap / Blue

The lug width of the Rolex Day-Date 36 ref. 118139-0004 is precisely 20 mm. This measurement represents the distance between the two lugs where the strap attaches to the case. It is essential to verify this dimension before purchasing a replacement strap, as even minimal variations (such as 19 mm found on vintage models) will render the strap incompatible.

For a white gold Day-Date 36, ideal straps include African alligator with fine grain, which enhances the lustre of white gold without competing with it, or vegetable-tanned calf leather for greater versatility. Shell cordovan represents a sophisticated choice for those desiring an extremely thin profile. All these materials guarantee longevity and develop natural patinas that harmonise with the aging of white gold.

Changing the strap requires a spring bar tool and a protected work surface. Gently remove the pins from the case lugs, taking care not to scratch the white gold. Insert the pins into the new strap, maintaining pressure on one end of the pin until it clicks securely. If you lack experience, consult a certified Rolex watchmaker or Casati Milano service for guaranteed workmanship.

Any strap manufactured for the 20 mm lug width is compatible with the ref. 118139-0004. Browse the 20 mm strap collection on milanostraps.it, where you will find artisanal options in alligator, calf, shell cordovan and rubber. Always ensure the strap has been constructed specifically for 20 mm lug width and features compatible spring bars.

The lifespan of a leather strap depends on the material and usage. Quality artisanal alligator lasts 3–5 years with daily wear; vegetable-tanned calf lasts 2–4 years; shell cordovan, owing to natural density, can exceed 5 years. Direct sun exposure, excessive perspiration and chemical agents reduce longevity. Regular maintenance (gentle cleaning, drying, annual conditioning with natural oils) significantly extends the strap's lifespan.