Rolex
Datejust 31 278273-0032— lug 16mm

The Rolex Datejust 31 reference 278273-0032 has a lug width of 16mm. This is a specific technical dimension for this 31mm-case family, distinct from the 20mm of the Datejust 41. To purchase a compatible strap, it is essential to verify this measurement using a calliper, taken across the internal distance between the lower lugs of the case.

For the Datejust 31 278273-0032 in yellow Rolesor, the most suitable materials are porosus or hornback alligator — polished for formal occasions, matte for everyday wear — and vegetable-tanned calf leather for those seeking a personal patina over time. Shell cordovan suits those who prefer durability and a compact, dense surface. A deployant clasp in steel or yellow gold PVD provides the best symmetry with the two-tone case.

To replace the strap on the Datejust 31, the spring bars securing the bracelet to the case lugs must be removed using a fine-tipped spring bar tool. Work on a soft surface to protect the case. Since Rolex spring bars are precisely dimensioned, it is advisable to entrust the operation to a watchmaker or specialist atelier to avoid scratching the lugs.

Yes. The aftermarket offers high-quality straps for the Datejust 31 278273-0032 in the 16mm lug width. Milano Straps provides models in alligator, calf leather, shell cordovan and rubber, handcrafted with hand-stitching and edges trimmed precisely to the 16mm lug. Compatibility is guaranteed by the attachment width, regardless of the original Jubilee or Oyster bracelet.

The lifespan of a leather strap depends on the material, care and daily use. A high-quality vegetable-tanned alligator strap can last three to five years or more with regular conditioning and protection from water. Calf leather typically lasts one to three years. Shell cordovan, owing to the dense fibre of the horse's rump, is among the most long-lasting options. All Casati Milano straps carry an 18-month warranty against manufacturing defects.