Strap for Datejust 31 Rose Gold / Domed / Grey / President

The lug width of the Rolex Datejust 31 reference 278245-0026 is 16 millimetres. This measurement represents the space between the lugs on the watch case and is critical for strap compatibility. A strap with an attachment point smaller than 16mm will leave visible gaps at the sides of the lugs, whilst one larger than 16mm will not fit the lugs correctly. Measurement must be taken with precision using a calliper, measuring the external distance from lug to lug.

For the Datejust 31 in 18kt Everose gold, straps in dove-grey alligator, pearl-grey alligator, or vegetable-tanned calf leather represent the most refined choices. Alligator leather maintains the elevated luxury standard of the case and develops a natural patina with use. Vegetable-tanned calf offers daily versatility and ages beautifully. Shell Cordovan, for those seeking absolute excellence, confers superior colour depth and natural stiffness. Pairing with overtly sporty or casual straps is inadvisable, as such choices would undermine the model's inherently elegant character.

Changing the strap on the Datejust 31 requires specific tools: an Allen key to unfasten the lug screws, a nylon punch to avoid scratching the case, and steady hands. Procedure: place the watch on a soft surface, locate the small lug screws, loosen them slightly without complete removal, extract the old strap by applying controlled downward pressure, align the new strap's attachment points with the lugs, and retighten with moderation. If uncertain, entrust the operation to a certified Rolex professional or experienced watchmaker.

Yes, any strap with a 16mm lug width is compatible with the Datejust 31 278245-0026, provided the attachment points are precisely dimensioned. Quality aftermarket straps—crafted from alligator, calf, or Shell Cordovan—offer advantages over original Rolex straps: aesthetic personalisation, lower cost, superior colour variety. We recommend verifying the supplier's credentials and selecting recognised brands to guarantee durability and precise mechanical compatibility.

A premium quality leather strap (alligator, calf, Shell Cordovan) typically lasts between 5 and 10 years with moderate daily use. Durability depends on factors including: frequency of wear, climatic conditions (direct sunlight accelerates ageing), maintenance (periodic cleaning with a soft damp cloth), and original tanning quality. Vegetable-tanned straps develop natural patina and may last longer, as their beauty increases with age. A strap subjected to high stress (constant humidity, frequent perspiration) requires faster replacement. Casati Milano offers an 18-month warranty on manufacturing defects for straps made in-house.