Strap for Datejust 31 Stainless Steel/ Rose Gold / Domed - Diamond / Rose - Roman / Jubilee

The lug width of the Rolex Datejust 31 278341rbr-0006 is 16 millimetres. This measurement represents the internal distance between the two protrusions on the case that accommodate the strap. Measuring accurately is critical to ensure strap compatibility. A digital calliper positioned perpendicular to the lug is the most reliable verification tool.

The Datejust 31 278341rbr-0006 pairs magnificently with an alligator strap in vegetable tanning, ideal for its formal elegance and ability to develop patina over time. For those seeking daily fluidity, vegetable-tanned calf leather maintains the bicolour case elegantly without rigidity. For wrists desiring character, shell cordovan from equine croup offers natural lustre and exceptional durability. If you prefer contemporary versatility, a Cordura NATO strap or an FKM rubber strap keeps the Datejust functional and sporty.

Strap replacement requires a spring bar tool and patience. Position the watch with the lug facing upward, insert the spring bar tool from below under the end of the suspension bar and press gently to create space. Extract the suspension bar and remove the strap. Repeat the opposite operation with the new strap, ensuring that the bars are securely anchored to the protrusions. If unsure, entrust the task to a professional watchmaker to avoid damaging the case.

Absolutely. Any strap with a 16-millimetre lug width is compatible with the Datejust 31 278341rbr-0006, provided that the internal width is measured correctly. A quality aftermarket strap—in alligator, calf, shell cordovan or other materials—offers customisation and often superior tanning quality compared to standard Rolex straps. The key is to choose brands that respect construction parameters and use noble materials with certified vegetable tanning.

A vegetable-tanned leather strap typically lasts 4–7 years with daily wear, depending on replacement frequency and climatic conditions. Exposure to excessive moisture, acidic perspiration and prolonged heat accelerates wear. The leather naturally develops cracks and progressively thins at edges and underneath the buckle. A shell cordovan strap, thanks to the denser structure of equine croup, can extend lifespan to 10 years. To prolong useful life, we recommend alternating straps when possible, avoiding prolonged immersion and occasionally treating with natural wax. Casati Milano offers an 18-month warranty on manufacturing defects.