Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Stainless Steel - Sedna Gold - Diamond / Canopus Supernova / Bracelet

The lug width of the Constellation 131.25.29.20.52.003 is 18 millimetres. This is the distance between the two lateral pins that connect the case to the strap. It is essential to order straps specifically constructed for this width to avoid incompatibility or damage to the pins.

White or champagne alligator represents the most elegant choice for this model, amplifying the warmth of the Sedna Gold. Alternatively, vegetable-tanned calf leather offers natural patina over time, while NATO fabric in grey tones ensures modern versatility. The choice depends on the intended use and the watch's dial.

Strap replacement requires a specific tool (strap changer or spring bar tool) and precision when handling the lateral pins. Position the watch on a soft surface, use the tool to compress the pin on one side, gently remove the old strap, then insert the new one until it clicks into place. If you prefer to avoid the risk of damage, consult a professional watchmaker.

Yes, any strap specifically constructed for the 18mm lug width is compatible with this model. However, it is essential to verify that the strap is actually catalogued as 18mm, not 16mm or 20mm, as measurement errors cause incompatibility. Milanostraps offers a complete range of 18mm straps ready to use and customisable.

A premium leather strap (alligator or vegetable-tanned calf) worn daily maintains structural and aesthetic integrity between 18 and 36 months, depending on frequency of use, climate, and care applied. Exposure to moisture, sweat, and sunlight shortens this duration. The Casati Milano warranty covers 18 months of normal use, with the possibility of restoration or lining replacement beyond that period.