Strap for Constellation Co-Axial 38 Stainless Steel / Red Gold / Brown

The lug width of this model is exactly 20 millimeters. It is the distance between the two inner shoulders of the case, where the strap attachments are fitted. Any compatible strap must be constructed to this precise width to ensure correct fit without mechanical play.

The choice depends on intended use and desired aesthetic. For formal elegance, black alligator with vegetable tanning is timeless. For those seeking patina and versatility, burgundy shell cordovan with vegetable tanning is excellent. For seasonal rotation, a NATO in neutral tones or a rubber strap with a deployant clasp offers maximum practicality while maintaining visual balance.

The strap is attached to the lugs via spring bars. Using a thin, flat tool, compress the internal spring of the bar, which allows it to be extracted from its seat. Once free, the old strap slides away. The new strap is inserted while keeping the bar compressed until it locks firmly on both sides of the lugs. It is a simple operation that requires no special skills.

Yes, any strap with a 20 millimeter lug width is compatible with the Constellation 123.20.38.21.13.001. Custom-made straps from Milano Straps, built to specification, respect this standard and offer superior quality in terms of materials (alligator, cordovan, calf) and finishing compared to standard accessories.

A quality leather strap, with vegetable tanning and sartorial construction, lasts an average of 4-6 years with daily wear. Longevity depends on exposure to moisture, perspiration, and frequency of use. Straps made by Casati Milano include an 18-month warranty and can be serviced and regenerated to extend useful life.