Strap for Datejust 36 Stainless Steel / Diamond / Blue / Jubilee

The lug width of the Rolex Datejust 36 126284RBR-0009 is precisely 20 millimetres. This measurement is essential for selecting a compatible strap: it corresponds to the internal distance between the two lugs protruding from the case. A strap with an incorrect lug width will not fit properly and may generate lateral play, compromising both safety and aesthetics.

For the Datejust 36 bimetallic case (white gold + stainless steel), we recommend three materials in order of formal elegance: dark brown or black alligator (maximum luxury perception), vegetable-tanned calf (develops a noble patina over time), and FKM rubber (contemporary versatility and thermal comfort). The choice depends on intended use: formal, daily wear, or sport-casual.

Strap replacement requires a dedicated tool called a spring bar tool: insert it into the small lateral hole of the case lug and apply pressure to compress the internal spring, releasing the old strap. The new strap is installed by threading the lug width into the case lugs and allowing the spring to close. This is a straightforward operation but requires care to avoid scratching the case: we recommend having it performed by a specialised service centre.

Yes, provided the lug width is exactly 20 millimetres and the construction quality is high. Artisanal aftermarket straps represent an excellent alternative to official Rolex straps, offering customisation opportunities (material, colour, thickness) and lower costs. Casati Milano manufactures custom-made straps for this reference whilst maintaining Swiss watchmaking quality standards.

Longevity depends on material and maintenance. An alligator strap typically lasts 3-5 years with daily wear and annual conditioning. Vegetable-tanned calf, more delicate, wears faster (2-4 years) if exposed to moisture and perspiration, but develops a noble patina. FKM rubber offers greater durability (5-7 years) but may oxidise with prolonged UV exposure. Casati Milano provides straps with an 18-month warranty against manufacturing defects.