Strap for Constellation Co-Axial 35 Chronograph Double Eagle White Gold / Silver / Orange Alligator

The lug width of the Constellation 121.58.35.50.54.004 is exactly 16 millimetres. This measurement is calculated as the distance between the inner edges of the case lugs. A strap of smaller or larger width would result in aesthetic and functional misalignments. It is important to measure precisely using a digital calliper positioned between the inner points of the lugs.

For the Constellation in 18k white gold, we recommend three main options: black alligator for maximum formality (galas, official events); cognac brown calf for everyday versatility that maintains elegance; shell cordovan for those seeking aesthetic uniqueness and tactile character. The choice depends on the prevalent context of use and personal preferences regarding patina development over time.

The strap is replaced by extracting the lug pins (called 'spring bars') that connect the strap to the case. Use a dedicated tool to press the lower hook of the pin downward, creating space to remove the old strap and insert a new 16mm one. Ensure the pins are perfectly aligned and locked in position. For delicate operations on valuable watches, it is advisable to consult a qualified watchmaker.

Yes, any quality strap with a 16mm lug width is compatible with the 121.58.35.50.54.004. Milano Straps offers a specialised selection of 16mm straps in various materials (alligator, cordovan, calf, rubber) and finishes, all customisable in length, initials and stitching type. The Casati Milano atelier also creates bespoke custom straps with personalised consultation.

The lifespan of a leather strap depends on the quality of the leather and frequency of use. A high-quality alligator or cordovan strap, with traditional tanning, has an average lifespan of 3-5 years with daily use, extendable to 7-8 years with alternating use. The patina develops progressively, enhancing aesthetics. Milano Straps guarantees 18 months on straps created by the Casati Milano atelier, with the possibility of subsequent regenerations and repairs.