Strap for Datejust 36 Stainless Steel / Yellow Gold / Smooth / Slate Roman / Jubilee

The lug width (also known as strap width) of the Rolex Datejust 36 126203-0035 is 20 millimetres. This measurement represents the distance between the two inner lugs of the case where the strap attaches. It is the historic standard for the Datejust 36 and ensures optimal proportions between the strap and the 36mm case diameter.

The choice depends on your usage patterns and personal preferences. For formal and business contexts, alligator leather in black or dark brown represents the most elegant option. For everyday versatility, grained calf leather offers durability and authentic aging. For maximum practicality, a NATO textile strap in grey or olive green allows fluid transitions between different contexts. Vegetable-tanned leather guarantees chromatic evolution over time.

Changing the strap requires a specific tool: a spring bar removal tool. Position the tool under the spring bar connecting the strap to the case, apply gentle inward pressure and lift the strap. Repeat the operation on the opposite side. When remounting, ensure both spring bars are fully seated in their lugs. If you are uncertain, consult an authorised Rolex service centre.

Any strap with a 20-millimetre lug width is compatible with your Datejust 36. The material can vary: alligator, calf, shell cordovan, rubber, or NATO textile. It is essential to verify that the strap is specifically designed for a 20mm lug width, as this is the only size compatible with the original Rolex lugs on this model.

Longevity depends on the material, tanning method and usage. An alligator strap can last 3–5 years under normal conditions; calf leather, owing to its greater density, can reach 5–7 years. Shell cordovan is the most durable and can exceed 10 years. Vegetable tanning prolongs service life by maintaining elasticity. Factors such as humidity, perspiration and frequency of use accelerate wear. Casati Milano provides an 18-month warranty against manufacturing defects.