Strap for Constellation Quartz 27 Polished Stainless Steel / Diamond / MOP Supernova

The lug width of the Constellation 123.15.27.60.55.004 is 20mm. This dimension is critical for selecting a compatible strap and is measured as the distance between the two lugs that connect the case to the strap. All 20mm straps are compatible with this model.

For the Constellation 123.15.27.60.55.004 we recommend black alligator for formal occasions, Italian vegetable-tanned calf leather for daily wear with natural patina, or shell cordovan for those seeking maximum durability. The choice depends on usage: daily wear suggests Italian leather, evening wear suggests alligator.

The replacement requires a specific tool (spring bar tool). Remove the original strap by inserting the tool into the dedicated side slots, relieve the pressure on the spring bars and slide the old strap away. Insert the new strap by positioning one spring bar first, then the other, until you feel the click. If you're not confident, entrust the job to a professional watchmaker.

Yes, any strap with a 20mm lug width is compatible. Milanostraps offers handcrafted 20mm straps customizable in leather, color and stitching thread. Always verify that the strap is specifically 20mm to guarantee perfect compatibility with the case lugs.

The durability depends on the material and usage. Quality alligator lasts 5-7 years with moderate daily wear. Italian vegetable-tanned calf leather, while developing a patina, resists 4-6 years. Shell cordovan can exceed 10 years. Atelier Casati Milano offers 18-month warranty on custom straps.