Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Stainless Steel / Yellow Gold / MOP / Diamond

The lug width of the Constellation 131.25.29.20.55.002 is 18mm. To verify this correctly, position a ruler between the two case attachment holes, excluding the curved terminals of the pins: the value must be exactly 18mm. This dimension is specific to the female watches in the 29mm Constellation collection and does not coincide with more common standards (16mm or 20mm).

Alligator represents the premium choice for the Constellation 131.25.29.20.55.002: its regular and symmetrical texture dialogues with the rigidity of the bi-metallic case, and its natural patina develops authenticity over time. Valid alternatives include shell cordovan (burgundy color, durability exceeding 3 years) and vegetable-tanned calf leather for those who prefer chromatic evolution over time. For summer use, a high-density cotton NATO offers practicality without compromising elegance.

Strap replacement requires a spring bar tool or a specific spatula. Position the watch with the dial facing downward, locate the lug access hole (usually at 9 or 3 o'clock), insert the tool to gently push the internal spring outward, removing the pin. Repeat for the other lug. The new strap is inserted by aligning the terminals to the holes and pressing until you hear the click of spring repositioning. If unsure, consult a professional strap maker: Casati Milano offers mounting service by appointment.

Any strap with an 18mm lug width is compatible, provided it is made to measure for the case width of the Constellation (29mm). Always verify that the strap maker specifies compatibility with 18mm lugs: many aftermarket manufacturers do not cover this dimension, favoring 16mm or 20mm standards. On milanostraps.it the 18mm strap collection includes options tested for aesthetic harmony with the Constellation.

Durability depends on the material and usage: alligator maintains structural integrity between 3 and 5 years of daily use; shell cordovan exceeds 3 years thanks to fiber density; vegetable-tanned calf leather varies between 2 and 4 years depending on frequency of moisture exposure. A high-quality leather strap, custom-made by certified workshops (such as Casati Milano), with seasonal maintenance and storage in a dry environment, significantly extends durability. The 18-month warranty covers manufacturing defects, not natural wear.