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

The lug width of the Rolex Datejust 31 ref. 278344rbr-0030 is 16 mm. This measurement represents the distance between the two attachment points of the strap on the watch case. To verify it, use a digital calliper and measure the distance between the inner shoulders of the lugs: the result must be exactly 16 mm to ensure perfect strap insertion without lateral play.

For this two-tone combination of white gold and stainless steel with champagne dial, we recommend a dark brown alligator strap or a black smooth calf leather strap, both tanned using vegetable methods. Alligator emphasises classic elegance, while black calf creates a fascinating graphic contrast with the white gold. For a more sporty option, a navy blue NATO strap works equally well for weekend wear whilst maintaining constructive seriousness.

To change the strap, you will need a spring bar tool with a rounded tip. Place the watch on a soft surface, insert the tool tip under the spring of the upper lug and apply gentle upward pressure to release the bar. Repeat on the lower lug. Once both bars are free, remove the old strap and insert the new one by aligning the holes with the bars, then press until you hear a click. If you lack experience, consult a professional watchmaker.

Yes, any artisanal strap made for the 16 mm lug width is compatible with the Datejust 31 ref. 278344rbr-0030. Compatibility depends solely on the lug width measurement (16 mm) and not on the strap manufacturer's brand. On milanostraps.it you will find a selection of handcrafted 16 mm straps made in Milan with vegetable tanning, available in numerous materials and finishes.

The lifespan of a leather strap depends on usage, tanning quality and environmental conditions. On average, a high-quality alligator or calf strap made with vegetable tanning lasts between 3 and 7 years with daily wear. Factors that shorten its life include constant exposure to moisture, perspiration and UV rays. Casati Milano guarantees 18 months against manufacturing defects and recommends having the strap inspected periodically by a professional to check the wear of the stitching and deployante buckle.