Strap for Day-Date 36 Yellow Gold Diamonds / President Diamond / Silver Diamond

The lug width of the Day-Date 36 in yellow gold (reference 118348-0039) is precisely 20 millimetres. This width is measured on the inside of the lugs, between the two terminals, and is essential to ensure ergonomic fit without stress on the watch case lugs. Rolex has standardised this dimension across the entire Day-Date 36 line.

Alligator remains the historical and optimal choice for the yellow gold Day-Date 36: its natural grain complements the precious metal elegantly. Refined alternatives include vegetable-tanned calf leather (which ages beautifully) and shell cordovan in burgundy or brown tones. Technical rubber with a deployante clasp is ideal for those seeking versatility between formal and casual contexts.

Strap replacement requires a specific tool (spring bar remover) to gently disengage the attachments from the lugs. We recommend working on a soft surface (rubber mat) to avoid scratching the yellow gold case. If you are not confident in your abilities, entrust the work to a certified watchmaker or contact our Casati Milano atelier for a bespoke service.

Yes, provided the strap is manufactured for the 20mm lug width. However, not all 20mm straps have identical construction tolerances: Rolex uses lugs with very precise standards. An artisanal strap of superior quality, manufactured with rigorous tolerances, guarantees perfect fit and respect for the original case geometry.

A quality leather strap (alligator, cordovan or vegetable-tanned calf) lasts 4–7 years with daily use and routine maintenance. Longevity depends on the type of leather, frequency of use, exposure to moisture and care: a strap protected from excessive humidity and regularly cleaned with a soft brush can exceed 10 years. Casati Milano offers an 18-month guarantee against manufacturing defects.