Strap for Datejust 36 Stainless Steel Diamond / Jubilee / Blue

The lug width (ansa width) of the Datejust 36 116244-0063 is precisely 20 millimetres. This measurement represents the distance between the two lugs where the strap attaches to the case. It is essential to respect this dimension with accuracy: a 19 mm or 21 mm strap will not fit with the correct tolerance, generating unwanted play and risk of wear. Always measure with a digital calliper, from the inside point of one lug to the other, excluding the case curve.

The choice depends on your use and personal style. Genuine alligator remains the conservative solution: the leather develops natural patina and character over time, offering a unique personality. Vegetable-tanned calf offers uniform grain and noble ageing. Shell cordovan is reserved for those who understand wear resistance: a cordovan strap, with proper care, can exceed ten years without losing its profile. For a sportier aesthetic, NATO in silk or waxed cotton offers an informal yet elegant look. Vulcanised rubber works well with the dial and dial colour, ideal for warm climates or aquatic environments.

Changing the strap on a Datejust 36 requires a specific tool: the spring bar tool (bastoncino a molla). Position the thin end of the tool under the internal catch of the spring and push gently outward to release the pin. Repeat at the other end of the strap. Remove the old strap and align the holes of the new strap with the case lugs. Press the pin until it clicks into place with a slight snap. This is a delicate operation: if unsure, entrust the work to a professional watchmaker or contact Casati Milano for assistance.

Yes, certified aftermarket straps compatible with the 20 mm lug width of the Datejust 36 do exist. The milanostraps.it collection offers handcrafted straps made in Italy with selected materials: alligator, calf, shell cordovan and rubber. Each strap is constructed with lugs and buckles dedicated to your watch, ensuring precise fit to the 20 millimetre lug. With the Casati Milano service, you also have the option to personally choose the leather in the atelier and follow every phase of construction.

Durability depends on leather quality and use. A genuine alligator strap, with proper maintenance, lasts an average of 5-7 years of daily wear, whilst maintaining functionality beyond this period. Vegetable-tanned calf offers similar durability. Shell cordovan, due to its ceramic consistency and wear resistance, can exceed 10 years. Vulcanised rubber, if protected from excessive sun exposure, lasts 8-12 years. Maintenance is crucial: regularly clean the leather with a damp cloth, avoid prolonged immersion and apply leather-specific balms every 6-12 months. A well-maintained strap ages nobly and acquires character.