Rolex
Datejust 31 178274-0056— lug 16mm

The lug width of the Rolex Datejust 31 178274-0056 is precisely 16 millimetres. This measurement represents the distance between the two spring bar attachment points on the case. To verify, remove the strap and measure with a calliper the width between the lug holes: it must be exactly 16 mm.

For the Datejust 31 178274-0056, we recommend straps in natural alligator with vegetable tanning, box calf, or shell cordovan. Dark brown or black alligator creates elegant contrast against the mother-of-pearl dial, whilst calf leather offers fine grain and evolving patina. Both enhance the sophistication of the white Rolesor case.

The process requires a spring bar tool to compress the attachment springs. Position the Rolex on a work surface or with a watchmaker, gently compress the internal spring of the pin, and slide the old strap out of the case lugs. Insert the new strap by aligning the pin through both lug holes: the spring will click into locking position when the pin reaches the bottom.

Yes, provided it is crafted with 16-millimetre lug width. High-quality artisanal straps, such as those by Casati Milano, ensure precise compatibility and construction exceeding the original strap. The 18-month warranty on manufacturing defects provides confidence in durability and craftsmanship.

Longevity depends on material and usage. A natural alligator strap with vegetable tanning lasts 5–7 years with daily wear, developing character patina. Shell cordovan easily exceeds 10 years. Calf leather ranges from 4–6 years. Exposure to humidity, perspiration, and sunlight accelerates wear; regular drying and alternating straps significantly extends useful life.