Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Stainless Steel - Diamond / Purple Meteorite

The lug width of reference 131.15.29.20.99.001 is 18mm. This measurement is determined by the distance between the inner shoulders of the case and represents the essential parameter for selecting a compatible strap. To verify it, use a digital caliper positioned perpendicularly to the lugs, avoiding excessive pressure that could distort the reading.

Mid-to-high quality alligator with vegetable tanning represents the aesthetic choice most coherent with the compact proportions of this model: ordered scales create a texture contrast with the satin case, enhancing the stellar details of the bezel. An equally valid alternative is Hermès calf in smooth grain or taurillon, which develops a personal patina over time. For sports environments, black vulcanized rubber maintains elasticity and does not absorb moisture.

Remove the used strap using a dedicated tool (spring bar tool) to compress the lateral pins that lock the strap to the lugs. Extract the pins and the strap will be released. Position the new strap by aligning the holes with the pins, then reinsert the pins using the same tool. Verify that the strap is securely fastened by pulling gently. If you do not have tools, entrust the task to a specialized craftsman such as Casati Milano.

Yes. The 18mm lug width allows compatibility with aftermarket straps of variable construction quality. However, we recommend selecting specialized manufacturers that understand the proportions of the compact case: straps with excessive thickness or massive buckles would compromise the formal elegance of this model. Milanostraps offers a curated selection of 18mm artisanal straps, customizable in material and color.

A quality leather strap (alligator with vegetable tanning or Hermès calf) has an average lifespan of 4-6 years with ordinary maintenance: gentle cleaning with a damp cloth, protection from excessive moisture and direct sunlight. The flex area (where the strap bends around the wrist) undergoes greater wear and may require replacement before other areas. Vulcanized rubber has a longer lifespan (8-10 years) but tends to discolor more rapidly. Casati Milano offers an 18-month warranty on all artisanal straps manufactured.