Strap for Datejust 31 Stainless Steel Diamond / Jubilee / Pink MOP - Roman

The Rolex Datejust 31 reference 178384-0028 features a lug width of 16 millimetres. This is the internal horizontal distance between the two spring bars on the case. Correct measurement is performed by removing the original strap and using a digital calliper. A half-millimetre discrepancy will prevent the aftermarket strap from fitting, making this measurement essential when selecting a compatible strap.

For the Datejust 31 178384-0028, we recommend alligator straps in black, which amplify the two-tone contrast of the white gold and steel case. Alternatively, a calfskin with English grain finish in burgundy offers formal elegance, whilst warm brown shell cordovan enhances the white gold. The choice depends on intended use: daily wear benefits from calfskin's moisture resistance; formal occasions demand alligator's refinement.

Remove the strap using a dedicated spring bar remover tool on the case's lateral pins. Position the watch on a stable base, locate the side pin, insert the tool into its designated seat, and apply uniform pressure until full detachment. Never use screwdrivers or improvised tools—you risk scratching the lugs. Insert the new strap by aligning the spring bars with the seats and apply pressure until you hear a clicking engagement. Many prefer entrusting this operation to a certified watchmaker.

Absolutely, provided the lug width matches precisely. For the 178384-0028, seek 16mm straps. Rolex does not prohibit third-party straps, and many collectors choose artisanal straps to personalise their watch. High-quality bespoke straps, such as those from Casati Milano, guarantee durability and aesthetics equal to or superior to the original Rolex strap.

Longevity depends on material and usage patterns. A calfskin English grain strap typically lasts 3–5 years with daily wear and regular perspiration exposure. Alligator, thanks to superior texture density, may exceed 7–8 years. Shell cordovan easily reaches 8–10 years. Vegetable-tanned leather develops a patina that visually improves over time. Proper maintenance (specific creams, drying after water contact) significantly extends working life. Casati Milano provides an 18-month warranty on manufacturing defects.