Rolex
Datejust 31 178275f-0025— lug 16mm

The lug width is 16 millimetres. This dimension is specific to the 31mm Datejust models in rose gold, ensuring correct proportioning between case and strap. To verify the measurement, use a digital calliper positioned perpendicularly between the outer edges of the two lugs.

We recommend natural alligator in cognac tones, which emphasises the aesthetic depth of Everose gold, or lacquered black for formal occasions. Alternatively, satin calf with vegetable tanning offers extraordinary natural ageing and greater versatility. Shell cordovan represents the premium choice for those who appreciate a rich patina and visible ageing over time.

The Datejust 31 typically uses a spring bar system. To change: remove the watch, position it strap-side down, use a dedicated tool or thin screwdriver to depress the spring bars, then remove the old strap by inserting one lug end under the bar first, then the other. If inexperienced, consult a certified watchmaker or Casati Milano atelier.

Yes, but with caution: compatibility depends on lug width (16mm for this model). However, an inferior quality strap compromises aesthetic balance and functionality. All Milano Straps collections for the 16mm lug width have been ergonomically tested and meet Rolex dimensional standards, guaranteeing correct visual and mechanical integration.

A high-quality artisanal alligator or calf strap typically lasts 3-5 years of intensive daily wear before requiring aesthetic reconditioning (smoothing, re-polishing). Shell cordovan, thanks to its dense fibrous structure, can last 5-7 years whilst maintaining excellent mechanical performance. Lifespan depends on perspiration exposure, humidity, and climate. We recommend rotating straps if the watch is worn daily, allowing the leather to dry completely between uses.