Strap for Datejust 31 Stainless Steel Fluted / Jubilee / Pink Roman

The lug width of the Rolex Datejust 31 178274-0077 is 16 mm. This measurement is taken between the inner walls of the Oyster case lugs and is the critical dimension for selecting a compatible aftermarket strap. It is advisable to verify this with a calliper, particularly if the case has undergone polishing or servicing.

For the Datejust 31 178274-0077 in stainless steel and white gold, alligator straps with a square-pore finish or vegetable-tanned calfskin represent the most coherent choice for the formal register of the case. Shell cordovan is preferable for those requiring superior durability. NATO nylon straps suit less formal contexts, while vulcanised rubber is recommended for aquatic use.

To remove the original bracelet or strap on the Rolex Datejust 31, a suitable spring bar tool — preferably with a forked tip — is required to release the spring bars from the lugs. Care must be taken to avoid scratching the white gold case. Casati Milano also offers a strap-fitting service by appointment at its Milan atelier.

Yes, there are numerous compatible aftermarket straps, provided they conform to the 16 mm lug width and feature curved ends consistent with the geometry of the Oyster case. Milano Straps offers a dedicated selection of handcrafted 16 mm straps, available online or customisable to order at Casati Milano.

The lifespan of a leather strap depends on the material and care: a quality alligator strap with vegetable tanning, treated with nourishing cream and kept away from prolonged contact with water and perspiration, can last 3–5 years whilst retaining its structural integrity and patina. Shell cordovan generally exceeds this threshold thanks to the density of its grain. Milano Straps provides an 18-month guarantee against manufacturing defects on all straps.