Strap for Datejust 31 Stainless Steel/ Yellow Gold / Domed / Olive - Roman / Jubilee

The Rolex Datejust 31 reference 278243-0016 has a lug width of 16mm. This measurement, taken between the two lugs at the point where they meet the case, is essential when selecting a compatible aftermarket strap. The lugs feature a specific curvature matching the Oyster case profile; curved-end straps are recommended for a precise and flush fit.

For the Datejust 31 ref. 278243-0016 in Yellow Rolesor, alligator straps with Mississippiensis grain or vegetable-tanned calfskin are the most appropriate choices given the formal character of the piece. Alligator leather complements the yellow gold components, while calfskin develops a natural patina over time. For casual or summer wear, nylon NATO straps or vulcanised rubber offer practicality without compromising the Oyster case integrity.

To replace the strap on a Datejust 31, a spring bar tool with a fine tip is required. Insert the tip into the slot on the lug, compress the spring bar and slide the strap free. Care must be taken to avoid scratching the lug surfaces. It is advisable to work on a soft surface. If in doubt, consult a watchmaker or the Casati Milano atelier for a professional strap change.

Yes, a wide range of aftermarket straps is available for the ref. 278243-0016. The key requirement is a 16mm lug width and, for the best aesthetic result, curved ends matched to the Oyster case of the Datejust 31. Milano Straps offers a curated selection of handcrafted 16mm straps in various materials — alligator, calfskin, shell cordovan, rubber — with spring bars and buckles proportioned to the 31mm case diameter.

The lifespan of a leather strap depends on the material and frequency of use. A quality alligator strap with vegetable tanning can last between 3 and 7 years with regular wear, provided it is kept away from water, perfumes and prolonged perspiration. Calfskin typically has a shorter lifespan of 2 to 4 years but develops a distinctive patina. Shell cordovan is among the most durable due to the density of its fibres. Milano Straps provides an 18-month guarantee against manufacturing defects on all its straps.