Rolex
Day-Date 40 228349RBR-0046— lug 20mm

The lug width is exactly 20 millimetres. This measurement defines compatibility between the case and the strap: the strap must have a 20mm lug width to fit securely into the case lugs without forcing. You can verify this measurement using a digital calliper positioned perpendicularly between the inner edges of the case's two lugs.

For the 228349RBR-0046, we recommend dark brown or cognac alligator, which creates visual harmony with the white gold 950/1000 case. For absolute formal elegance, select black alligator. For less rigid contexts, calfskin or shell cordovan offer tactile softness whilst preserving case nobility. A white gold deployant clasp completes the colour matching.

The strap is changed via the lateral lugs (also called fixed lugs). Position the watch on a soft pad, locate the two small fixing screws hidden in the lugs at 3 and 9 o'clock, loosen them with a precision screwdriver and extract the lug. Next, remove the old strap and insert the new one, aligning it perfectly, then retighten the screws. If you are unfamiliar with this operation, contact an authorised Rolex service centre.

Yes, it is possible to use proven quality aftermarket straps, provided the lug width is exactly 20mm and material quality is certified. Artisanal straps in alligator, calfskin and shell cordovan produced by leading European tanneries guarantee durability over time. Casati Milano offers bespoke straps made to measure with the possibility of following the manufacturing process.

Durability depends on material and usage. Alligator, being particularly resistant, can last 5–8 years of daily use before requiring replacement. Calfskin and shell cordovan have similar durability, around 4–6 years. Longevity is prolonged if the strap is protected from excessive moisture and prolonged direct sunlight. A quality deployant clasp helps distribute tension evenly, reducing concentrated wear.