Rolex
Datejust 31 178273-0089— lug 16mm

The lug width of the Rolex Datejust 31 178273-0089 is 16 millimetres. This technical specification determines the width of the compatible strap. It is important to verify this measurement before purchasing an aftermarket strap, as a different lug width will not fit correctly and will either be too loose or impossible to mount.

The best strap depends on intended use and personal preference. For maximum formal elegance, black or dark brown alligator with vegetable tanning offers durability and develops patina over time. Coloured calf leather (cognac, mid-brown, bordeaux) creates aesthetic coherence with the yellow gold details of the case. For sporty environments, a high-density rubber strap maintains functionality whilst preserving luxury identity. Shell cordovan represents a niche choice for those seeking maximum durability and natural lustre.

The strap is changed by removing the spring bars (lugs) that hold it to the case. Using a spring bar remover tool, press the small button inside the lug to release the internal spring, allowing the bar to be extracted. Subsequently, the new strap is inserted by aligning the holes with the case lugs. For those unfamiliar with the procedure, it is advisable to consult a professional watchmaker to avoid damage to the delicate fastening mechanisms.

Yes, it is entirely possible and recommended. Aftermarket straps of quality, manufactured to the 16mm lug width specification, fit perfectly on the Datejust 31 178273-0089. Choosing an artisanal strap in precious leather (alligator, calf, shell cordovan) tailored bespoke allows you to personalise the timepiece whilst maintaining elevated quality standards. Specialist craftsmen such as Casati Milano also offer bespoke services with direct consultation on material selection.

The lifespan of a leather strap varies based on material, usage and maintenance. A quality alligator or shell cordovan, with appropriate care (regular cleaning, protection from excessive moisture), can last 5-8 years of daily wear. Calf leather typically lasts 3-5 years before showing signs of wear. Regular maintenance (treatment with natural oils, water protection) significantly extends longevity. Manufacturing defect warranty typically covers 18 months, as in the case of Casati Milano services.