Strap for Datejust 31 Rolesor Yellow Fluted Diamond / Jubilee / Silver Diamond

The lug width of the Datejust 31 178313-0027 is 16mm. This dimension is specific to this compact model and is determined by the geometry of the case's lateral lugs. A 16mm strap must fit securely without force into the lug slots, ensuring both mechanical security and correct aesthetic proportion.

For the Datejust 31 in Rolesor (steel and yellow gold), ideal options include: American alligator in dark brown, aged shell cordovan, or vegetable-tanned calf in chocolate or mahogany tones. Alligator maintains formal elegance; cordovan develops unique patina over time; calf offers daily versatility. Avoid straps thicker than 4mm, which would alter the proportions of the compact case.

Strap replacement requires a dedicated spring bar tool to avoid scratching the case. Insert the flat tip of the tool into the hole at the base of the lug, applying gentle pressure to retract the spring. Remove the worn strap and insert the new one, ensuring the spring fully covers the pin. Repeat on both sides. If uncertain, consult an authorised Rolex service centre to prevent case damage.

Yes, provided the strap is precisely dimensioned at 16mm lug width. Handcrafted straps made from genuine leather (alligator, cordovan, calf) are fully compatible with the Datejust 31. Ensure the strap does not exceed 4mm total thickness and that the end pieces are properly shaped to prevent friction on the case.

Durability depends on frequency of use, moisture exposure, and leather quality. Premium-grade alligator or cordovan lasts 4-6 years with daily wear; vegetable-tanned calf resists for 3-5 years. Regular maintenance (cleaning and conditioning with specific creams) extends strap lifespan. Ateliers such as Casati Milano offer 18-month warranty on manufacturing defects, with professional restoration available.