Strap for Constellation Manhattan 25 Quartz Stainless Steel / MOP / Diamond

The Omega Constellation 131.15.25.60.55.001 with a 25mm case features a lug width of 16mm. This measurement is specific to the Constellation women's collection models and determines compatibility with aftermarket straps. To verify, measure the space between the two lugs with a digital caliper: the internal distance must be 16mm.

For the Constellation 131.15.25.60.55.001, we recommend alligator with a matte patina or vegetable-tanned calf in dark brown shades (mahogany brown, chocolate, or cognac). The alligator maintains a formal and evening tone without competing with the guilloché dial, while vegetable-tanned calf develops a noble patina over time. Avoid bright transparent straps that disturb the aesthetic balance of the 25mm case.

Changing the strap on a Constellation 131.15.25.60.55.001 is done by unscrewing (not extracting) the lug pins with an appropriate tool (spring bar tool). Remove the old strap, insert the new pins into the new strap respecting the orientation, and screw back in place. If you are unsure, consult a watchmaker: Casati Milano offers complete strap change assistance.

No, the Constellation 131.15.25.60.55.001 is constructed for 16mm lug widths. An 18mm or 20mm strap will not fit correctly and creates visible gaps or fit imbalances. The 25mm case proportion requires a 16mm lug width to maintain elegance and design aesthetic coherence.

An artisanal alligator or vegetable-tanned calf strap on a Constellation 131.15.25.60.55.001 typically lasts 3 to 5 years of regular use. Durability depends on seasonal use, body perspiration, and sun exposure levels. With vegetable tanning, the strap develops a pleasant patina and can be rejuvenated with maintenance every 2 years. Casati Milano guarantees 18 months on custom straps made in our atelier.