Rolex
Datejust 31 178344-0054— lug 16mm

The Rolex Datejust 31 reference 178344-0054 features an Oyster case with a lug width of 16 mm. This measurement is specific to the Datejust 31 family and should be verified using a digital calliper placed internally between the two lower lugs, flush against the case. Do not confuse it with the Datejust 28 (13 mm) or the Datejust 36 (20 mm).

For a Rolesor case in white gold and stainless steel such as the 178344-0054, a polished alligator strap is the most technically coherent choice: the scale texture complements the fluted white gold bezel. Alternatively, vegetable-tanned box calf leather offers refined everyday elegance with a developing patina over time. For a more sports-oriented wear, fine-grain vulcanised rubber maintains visual clarity without adding visual weight to the case.

To replace the strap or bracelet on the Datejust 31 178344-0054, a fine-tipped spring bar tool is required to release the spring bars housed within the Oyster lugs. It is advisable to rest the case on a watch cushion to avoid scratching the case back and to apply controlled, precise pressure. If in doubt, a professional watchmaker can complete the operation in minutes without any risk to the case.

Yes. Any strap with a 16 mm attachment and standard spring bars is compatible with the Datejust 31 178344-0054. Milanostraps.it offers a curated selection of handcrafted 16 mm straps in alligator, calf leather, shell cordovan and rubber, made with straight or slightly tapered ends to suit the Oyster lug geometry. It is important to verify the overall strap length (typically 110/75 mm for an average female wrist).

The lifespan of a leather strap depends on hide quality, maintenance and usage. A high-quality alligator or vegetable-tanned calf strap, kept away from prolonged water exposure and excessive perspiration, typically lasts between 2 and 5 years with daily wear. Casati Milano straps fitted to the Datejust 31 benefit from carefully selected hides and hand-finished edges, both factors that significantly extend the life of the piece.