Strap for Day-Date 36 White Gold - Diamond / Pink - Baguette / President - Diamond

The lug width (ansa measurement) of the Day-Date 36 128349RBR-0054 is 20 millimetres. This is the distance between the two internal horizontal pins where the strap attaches. It is specific to this model and differs from the 22mm lugs found on other Rolex references. When ordering an aftermarket strap, ensure it is certified for 20mm lugs, otherwise it will not fit the attachment points correctly.

For the 128349RBR-0054 in 18k white gold, we recommend genuine alligator (black, burgundy, or cognac brown) as the primary choice. The dorsal texture of alligator creates aesthetic balance with the smoothness of white gold. Alternatively, shell cordovan (equine shell) offers dense grain and unparalleled natural patina. Calf leather with vegetable tanning is acceptable in neutral tones (hazelnut, pearl grey). Avoid rubber or fabric: these would transform the formal character of the Day-Date into a sports watch aesthetic.

The Day-Date 36 uses standard spring bars for attachment. You will need a dedicated spring bar tool to release the tension and extract the strap from the lugs. If you lack experience, entrust the work to a certified watchmaker: incorrect manipulation risks scratching the white gold case. Casati Milano also offers strap replacement service at the Milan atelier.

Yes, provided the strap is specifically measured at 20mm between the pins. Many aftermarket straps assume 22mm lugs by default. A 22mm strap forces the lugs, damages the case, and causes stress to the pins. Always verify the seller's specifications. Casati Milano custom straps for 20mm lugs guarantee mechanical precision and zero forcing.

The lifespan of an alligator strap ranges from 3 to 7 years, depending on frequency of use and environmental conditions (humidity, sun exposure). A shell cordovan strap, being more resilient, can last 7–10 years. Factors that reduce lifespan include frequent perspiration, prolonged direct sunlight, and very humid environments. A protective treatment (natural wax finish) every six months significantly extends useful life. Casati Milano provides an 18-month guarantee against manufacturing defects.