Strap for Day-Date 36 Everose Gold - Diamond / Green Aventurine / President

The lug width (ansa width) of the Day-Date 36 reference 128345RBR-0068 is precisely 20 mm. This measurement refers to the horizontal distance between the spring bar attachment points on the case lug housing. A 20 mm strap integrates seamlessly into this housing, ensuring stability and correct weight distribution on the wrist.

For the Day-Date 36 in Everose 18k, we recommend alligator from French tanneries (fine grain, warm patina development over time), vegetable-tanned calf leather (visible grain, natural colour evolution), or shell cordovan (crystalline density, intrinsic water resistance). Your choice depends on context: alligator for pure elegance, calf for environmental consciousness, cordovan for deliberate durability.

Strap replacement requires a small Teflon-tipped tool (spring bar tool) to avoid scratching the case. Position the watch on a soft cloth, locate the small hole beneath the lug, gently push the pin inward until the spring releases, remove the old strap, align the new strap's pin with the hole, and release. This is a fully reversible operation that causes no permanent damage to the case.

Yes, any strap with a certified 20 mm lug width is fully compatible with the Day-Date 36. Verify that the strap was manufactured for this specific width and that the pin tolerance is within ±0.1 mm. High-quality Haute Couture straps (such as Casati Milano) guarantee total compatibility and long-term maintenance support.

A natural leather strap (alligator, calf, shell cordovan) with daily wear and basic maintenance lasts between 2 and 4 years, depending on the tannery method and humidity exposure. French-tanned alligator typically develops microscopic creasing after 18–24 months, a sign of aesthetic maturity rather than functional failure. Casati Milano offers 18-month warranty on manufacturing defects and reconditioning services after natural wear.