Rolex
Day-Date 36 118389-0093— lug 20mm

The lug width is 20 millimetres. This standard represents the historical dimension of the Day-Date, maintained in the contemporary 118389-0093 reference in 18ct white gold. To verify compatibility, measure the distance between the lug attachment points on the case using a calliper with 0.5mm precision. Accuracy is essential for optimal strap installation.

For an 18ct white gold case with blue dial, alligator is the most refined choice: its large-scale texture amplifies the prestige of the case. Alternatively, vegetable-tanned calf leather with a matte finish and fine grain offers restraint and develops noble patina over time. Shell cordovan, for those seeking absolute rarity, also pairs perfectly with white gold. The deployant clasp should be in white gold for material coherence.

The Day-Date 36 is equipped with a strap integrated into the Rolex anchorage system. To change it, use a specific tool to extract the spring bars from the lugs: insert the lever into the groove, withdraw the old bar and insert the new one. Ensure the bars click correctly on both sides. If you lack expertise, entrust the task to an authorised Rolex service centre or a specialist atelier.

Yes, any strap with a 20mm lug width is compatible, provided the attachment pins (spring bars) match the length and diameter of the Rolex standard. Quality artisanal straps use certified bars of 1.8mm diameter. Rely on specialist suppliers who guarantee micrometric tolerances and quality control, such as the skilled ateliers of Casati Milano.

A strap made with vegetable tanning and waxed-synthetic stitching lasts an average of 5-7 years with daily use, reaching 10 years with regular maintenance. Alligator, being denser and more structured, reaches 8-12 years. Longevity depends on environmental factors (humidity, sun exposure, perspiration), frequency of use and maintenance. Monthly cleaning with a damp cloth and balm application every 6 months significantly extend the strap's lifespan.