Rolex
Datejust 31 178158-0008— lug 16mm

The Rolex Datejust 31 reference 178158-0008 features a lug width of 16mm. This measurement should be taken with a calliper at the spring bar attachment point, inside the lugs, to ensure accurate compatibility with any aftermarket strap.

For an 18k yellow gold case such as that of the Datejust 31 178158-0008, straps in grained alligator or shell cordovan in warm tones (cognac, bordeaux, chocolate) offer the finest aesthetic balance. Vegetable-tanned calf leather is a sound alternative for those who appreciate a natural patina developing over time. A gold-tone deployant clasp completes the pairing with material consistency.

To remove the original bracelet or strap from the Datejust 31, use a fine-tipped springbar tool, inserting it into the gap between the lug and the strap to compress the spring bars. Always work on a soft surface to avoid scratching the gold case. It is advisable to entrust this operation to a watchmaker or specialist atelier to preserve the integrity of the original lugs.

Yes. Several artisan manufacturers, including Casati Milano for milanostraps.it, produce straps with a 16mm attachment compatible with the Datejust 31 178158-0008. It is essential that the strap is precisely cut to 16mm at the base and that the spring bars are of appropriate diameter (standard 1.8mm) to ensure a correct and secure fit within the original Rolex lugs.

Longevity depends on leather quality, frequency of wear, and exposure to moisture and perspiration. A top-grade alligator or shell cordovan strap with reinforced stitching and finished edges can last between 3 and 6 years with regular use. Vegetable-tanned calf leather develops patina but requires periodic conditioning. Casati Milano provides an 18-month guarantee against manufacturing defects.