Strap for Datejust 31 Rolesor Yellow Fluted Diamond / Jubilee / Champagne Diamond

The Rolex Datejust 31 ref. 178313-0029 features a lug width of 16mm. This measurement is specific to the 31mm case and is critical for aftermarket strap compatibility. Before purchasing a replacement strap, it is advisable to verify the lug width using a digital calliper, measuring the internal distance between the two lugs at the point closest to the case.

For the yellow Rolesor configuration of the Datejust 31 178313-0029, the most suitable materials are alligator in cognac or tobacco — which harmonises chromatically with the yellow gold — and vegetable-tanned calf leather in black or brown for more understated daily wear. Shell cordovan is the premium choice for formal occasions, owing to its dense fibre and natural lustre. A deployant clasp in steel or gold-PVD is recommended to protect the gold lugs from repeated mechanical stress.

Strap replacement requires a dedicated springbar tool to remove the spring bars securing the strap to the lugs. Insert the tool tip into the lateral slot of the spring bar, compress the spring and slide the strap free. This operation requires care on gold lugs: it is advisable to protect the case with masking tape or to entrust the task to a watchmaker or atelier to avoid scratching the case.

Yes, there is a wide range of aftermarket straps compatible with the Datejust 31. The fundamental requirement is a lug width of 16mm. Milano Straps offers a curated selection of handcrafted straps in various materials — alligator, calf leather, shell cordovan, rubber — made specifically for this size, including spring bars and a choice of deployant or traditional buckle closures.

The lifespan of a handcrafted leather strap depends on the material, frequency of use and maintenance. A high-quality alligator strap, with daily wear and proper care (avoiding prolonged exposure to water and perspiration), typically lasts between three and five years. Vegetable-tanned calf leather offers a similar lifespan while developing a distinctive patina. Shell cordovan is the most durable material due to the density of its fibre. Casati Milano provides an 18-month warranty against manufacturing defects on all straps.