Rolex
Datejust 31 178278-0067— lug 16mm

The Rolex Datejust 31 ref. 178278-0067 has a lug width of 16mm. This measurement should be taken with a digital calliper positioned internally between the two lugs, flush against the case. Respecting this dimension is essential to ensure correct fitment and eliminate lateral play.

For an 18-carat yellow gold case, the most suitable materials are polished alligator (Mississippiensis or Niloticus) in cognac, brown or black tones, and vegetable-tanned calf leather for everyday wear that develops a natural patina over time. Shell cordovan is an excellent choice for those seeking longevity and a refined surface sheen. The correct width is 16mm at the lug, typically tapering to 14mm at the buckle end.

To replace the strap on a Datejust 31, use a precision springbar tool inserted into the small notches on the sides of the lugs to compress the springbars. Remove the existing strap, insert the new springbar into the lug hole and compress the spring to engage the opposite side. Given the yellow gold case, it is advisable to entrust this operation to a watchmaker or proceed with care to avoid scratching the case.

Yes. Any strap with a 16mm lug width and standard springbars is technically compatible with the Rolex Datejust 31 ref. 178278-0067. Milano Straps offers handcrafted straps in leather, rubber and fabric specifically sized for this width, with finishes suited to the yellow gold case. Both pin buckle and deployant clasp options are available.

Longevity depends on the material and frequency of use. A quality alligator strap, worn regularly but rotated with other straps, typically lasts 3 to 5 years. Vegetable-tanned calf develops patina more quickly but has a comparable lifespan. Shell cordovan is the most durable of the fine leathers. Daily exposure to water or perspiration significantly reduces strap life. The Casati Milano guarantee covers manufacturing defects for 18 months.