Rolex
Datejust 31 278344rbr-0002— lug 16mm

The lug width of the Rolex Datejust 31 278344rbr-0002 is 16mm. This measurement is precise and determined by the geometry of the lugs in white gold and stainless steel of the case. Any aftermarket strap must respect exactly this width to ensure a perfect fit and maintain the original proportions of the model.

For the Datejust 31 two-tone, alligator represents the classic and harmonious choice, particularly in cognac, light brown or pearl grey shades that dialogue with the white gold case. Alternatively, shell cordovan offers sophisticated character and natural patina over time, whilst vegetable-tanned calf ensures authenticity for informal contexts. A deployante clasp is strongly recommended for all leather variants.

To change the strap on a Rolex Datejust 31, you must use a spring bar remover tool specifically designed for watches. Position the remover under the lug of the case at the strap holes, apply gentle pressure to release the spring, then extract the old strap. Insert the new strap (16mm width) aligning the holes with the lugs, then press until the spring clicks into place. We recommend performing this operation on a clean surface and never forcing the movement: if the strap does not enter smoothly, it may have incorrect dimensions.

Yes, it is entirely possible to use a quality aftermarket strap on this Datejust 31, provided it strictly respects the 16mm lug width. Choosing straps made with noble materials (alligator, shell cordovan, vegetable-tanned calf) and constructed to artisanal standards ensures aesthetic coherence and functional longevity. On milanostraps.it you will find a curated selection of 16mm straps compatible with this model.

The lifespan of a leather strap on a Datejust 31 varies according to material, frequency of use and environmental conditions. A quality artisanal alligator strap typically lasts 3-5 years in daily use, developing patina and character over time. Shell cordovan is generally more durable (4-7 years) thanks to its natural density, while vegetable-tanned calf requires more maintenance but can exceed 3 years. Direct exposure to water, intense sunlight and humidity shortens the useful life. Milano Straps offers 18 months warranty on manufacturing defects for all straps produced by Casati Milano, and provides replacement and repair service to extend longevity.

Cognac and light brown are universal shades for the two-tone: formal aesthetics, chromatic warmth that exalts the white gold case. Pearl grey offers elegant and contemporary contrast, ideal for evening occasions. Deep bordeaux in shell cordovan combines versatility and temporal evolution (patina deepens it over the years). For lovers of conscious boldness, navy blue in calf with white gold-coloured lugs creates contemporary harmony. Avoid pure black: the two-tone deserves chromatic warmth to express its full aesthetic authority.