Strap for Constellation Co-Axial 38 Red Gold / Diamond / Silver

The lug width of the model 123.55.38.21.52.007 is 22 millimetres. This dimension must be measured from spring to spring inside the lugs, excluding metal passants. A compatible strap must measure exactly 22mm to install correctly without forcing the attachments or leaving excessive play.

For a Constellation in 18k rose gold, alligator is the most natural choice: its regular scales and deep colour visually stabilise the warmth of rose metal. Alternatively, vegetable-tanned calf offers a patina that develops naturally over time, whilst shell cordovan provides greater structure and durability. The choice depends on intended use and personal aesthetic preference.

Strap replacement is performed by removing the spring bars from the attachments using a dedicated tool (spring bar tool). Position the watch on a stable surface, gently compress the spring, extract the metal pin from the holes, then install the new strap by reversing the operation. If inexperienced, it is advisable to consult a professional watchmaker to avoid damaging the timepiece.

Yes, any strap with the correct 22-millimetre lug width is compatible with model 123.55.38.21.52.007. Always verify precise measurement before purchase: a 20mm strap would cause friction on the passants, whilst a 24mm strap would not fit at all. Straps available online at milanostraps.it are supplied in this dimension with compatibility guarantee.

The lifespan of a leather strap varies based on material, intensity of use and maintenance. High-quality alligator or shell cordovan can last 3-5 years with moderate use and regular care. Vegetable-tanned calf tends to develop characteristic patina after 1-2 years. Excessive humidity and prolonged sun exposure reduce longevity. A quality artisan aftermarket strap with 18-month warranty offers a good balance between reliability and sustainability.