Rolex
Datejust 31 178279-0081— lug 16mm

The Rolex Datejust 31 178279-0081 features a lug width of 16mm, measured between the two shoulders of the Rolex bayonet attachment. This dimension is specific to this model and requires conscious sourcing amongst aftermarket strap suppliers, as it represents an unconventional size in contemporary watchmaking.

Black or tortoise alligator represents the most aesthetically coherent choice with 18k white gold, thanks to its cool patina and natural texture that dialogues magnificently with the metal. French calf in dark brown and Shell Cordovan offer equivalent quality alternatives for those seeking warmer tones or pronounced natural lustre.

The Datejust 31 utilises a standard Rolex bayonet attachment. To change the strap, you require a specific removal tool (spring bar tool) to extract the fixing pins from the lugs. We recommend consulting a professional watchmaker or specialised service to avoid damage to the case. Casati Milano also offers this service during personalised strap delivery.

Absolutely. A high-quality aftermarket strap, crafted from materials such as alligator, calf or Shell Cordovan, does not compromise the watch's value or functionality. Rather, it permits personalisation of the Datejust according to the owner's aesthetic preferences, whilst maintaining perfect mechanical compatibility thanks to the standardised 16mm lug width.

Longevity depends on the material and intensity of use. A quality artisanal alligator strap, with vegetable tanning, may last 5-10 years under normal conditions, ageing positively. Shell Cordovan, more resilient, readily achieves 10-15 years. French calf attests at 4-7 years. Lifespan increases if the strap undergoes regular maintenance and is protected from excessive humidity and direct heat sources.