Strap for Day-Date 40 Yellow Gold - Diamond / Green - Ombré

The lug width of the Day-Date 40 reference 28348RBR-0045 is 20 millimetres. This measurement represents the distance between the spring bar holes, centre to centre. A 20mm strap ensures correct fitment on the case and provides balanced visual proportion.

For the 28348RBR-0045, we recommend Niloticus alligator in deep brown or cognac tones, which enhances the warmth of yellow gold with an ageing patina. Premium alternatives include vegetable-tanned black calf for intensified formal character, or Japanese shell cordovan for exceptional durability and natural lustre without artificial finishing.

Strap change requires a quality spring bar tool to avoid damaging the case. Release the spring bar pin from the case side, extract the pin, and position the new strap ensuring the pin is fully seated in both lug holes. For yellow gold Rolex cases, we recommend having the operation performed by a specialist to preserve the case finish.

Yes. Any strap with a 20mm lug width is compatible with the Day-Date 40 28348RBR-0045. Milanostraps provides bespoke artisanal straps in alligator, calf, shell cordovan, and rubber, with an 18-month warranty on manufacturing defects. Leather selection can be made directly at the Casati Milano atelier.

Longevity depends on tanning method and usage patterns. Vegetable-tanned alligator typically lasts 5-7 years under moderate daily wear. Calf leather tends toward 3-4 years. Japanese shell cordovan, owing to fibre density, achieves 8-10 years. Critical factors: solar exposure, humidity, wearing frequency, and surface maintenance (regular dusting and storage when unworn).