Strap for Constellation Co-Axial 38 Yellow Gold / Diamond / Champagne

The lug width is 20mm, which is the distance between the case attachment pins. This dimension is specific to the 123.55.38.21.58.001 model and must be strictly observed to guarantee correct fit and proper functioning of the deployant or buckle.

Dark brown or cognac alligator represents the ultimate formal choice, reinforcing the dial's sobriety and creating tonal continuity. Vegetable-tanned calf leather aged to beige-hazelnut tones is equally valid for less formal settings. A premium fabric carbon-grey strap offers maximum contrast while maintaining elegance.

Use a spring bar tool to remove the pins connecting the strap to the case. Position the tool under the lug from the sides and gently press to compress the internal pin. Extract it completely and repeat from the other side. Install the new strap by reversing the process, ensuring the pins snap firmly into position.

An aftermarket strap is compatible if it has exactly 20mm lug width. However, construction quality and material excellence vary considerably. Premium leather straps with vegetable tanning, genuine alligator, or shell cordovan guarantee longevity and develop patina over time, elevating the watch's perceived value.

A quality leather strap with vegetable tanning lasts an average of 3-5 years with daily wear, developing natural patina that makes it more appealing over time. Factors such as humidity, sun exposure, and maintenance influence longevity. An 18-month warranty is standard for artisanal straps. Vegetable tanning ages better than chrome tanning, maintaining structure and aesthetics longer.