Strap for Day-Date 36 White Gold / Diamond / Blue Ombré-Diamond / President

The lug width of the Rolex Day-Date 36 128349RBR-0010 is precisely 20 millimetres. This dimension is the exact distance between the two spring bars that connect the case to the strap. To verify it, you must remove the original strap and measure with a calliper the internal distance of the case where the spring bars insert. No tolerance is acceptable: a 20mm strap must be exactly 20mm wide to ensure proper alignment and secure attachment.

For the Rolex Day-Date 36 in white gold, alligator leather remains the most coherent choice with the watch's prestige. Its regular texture and small scales harmonise elegantly with the case proportions. Alternatively, shell cordovan (horse leather) offers a compact grain and sophisticated natural lustre. Vegetable-tanned calf leather is recommended for those preferring greater versatility, whilst rubber is ideal for sports or tropical contexts without compromising elegance or formal appearance.

Changing the strap requires removal of the spring bars connecting the case to the strap. A specialised tool (spring bar tool) is necessary to push the bars inward on one side. Position the watch securely, locate the spring bar under the lug, insert the tool into the slot, and push the bar until it retracts. This allows the strap to slide off. To install the new strap: align the holes, insert the spring bar, and ensure it clicks securely on both sides. If you lack the tools or experience, consult a professional watchmaker.

Yes, any strap with a lug width of exactly 20 millimetres is compatible with the Rolex Day-Date 36 128349RBR-0010. It is essential to verify that the lug width is precisely 20mm, as an incorrect measurement would result in visible misalignment and attachment problems. Handcrafted straps available on Milano Straps are constructed to this specification and guarantee total compatibility, whilst allowing personalisation of leather, colour, and clasp type according to aesthetic preference.

Leather strap longevity depends on the material, frequency of use, and climatic conditions. A high-quality alligator or shell cordovan strap with vegetable tanning can last 5–7 years with regular use and proper maintenance. Leather must be kept dry, protected from excessive humidity and prolonged sun exposure. Chrome-tanned straps may extend durability to 8–10 years. Rubber straps are more durable (10+ years) but can degrade with UV exposure. Casati Milano offers an 18-month warranty against manufacturing defects and provides personalised maintenance advice.