Strap for Day-Date 40 Yellow Gold / Baguette / White - Roman

The lug width of the Rolex Day-Date 40 228348RBR-0034 is precisely 20 millimetres. This measurement represents the distance between the two attachment points on the watch case where the strap is secured. It is essential to choose a strap with a 20mm lug width to ensure proper fit and proportional wear without tension on the case.

For a Day-Date 40 in 18k yellow gold, we recommend: alligator dyed in warm tones (cognac, dark brown) for noble contrast; vegetable-tanned calfskin that develops a golden patina; shell cordovan that acquires lustre over time; modern textured rubber for sporty versatility. The choice depends on frequent usage and colour harmony with your skin undertone.

Changing the strap requires a specialised tool (strap remover) to remove the spring bars securing the strap to the case lugs. It is always advisable to entrust this operation to an experienced watchmaker or specialist atelier such as Casati Milano, which simultaneously verifies the condition of the case and lugs. Do not attempt this yourself without expertise to avoid scratches or damage.

Yes, any strap with a 20mm lug width is compatible with the Day-Date 40 228348RBR-0034. However, it is crucial to verify the construction quality of the buckle or deployant to guarantee reliability and durability. Casati Milano provides handcrafted leather straps in premium materials with an 18-month warranty against manufacturing defects, ensuring compatibility and longevity.

A premium leather strap (alligator, calfskin, shell cordovan) has an average lifespan of 3–5 years of daily wear, varying according to the tanning method, frequency of wear, and maintenance care. Leather develops a natural patina and requires occasional hydrating treatments. With Casati Milano you receive an 18-month warranty against manufacturing defects; beyond that period, the strap can be renewed or replaced through a new bespoke order.