Strap for Constellation Co-Axial 27 Brushed Stainless Steel / Yellow Gold / Diamond / MOP

The lug width of the 123.25.27.20.55.003 is 18mm. This is a precise measurement that requires straps specifically sized for this lug width; even minor variations (17.5mm or 18.5mm) will cause mechanical and aesthetic misalignment.

For this two-tone yellow gold and steel Constellation, alligator with tight grain in hazelnut or black offers formality without compromise. Vegetable-tanned calf leather introduces evolving patina; grey NATO enables sports versatility. The choice depends on frequency of wear and context: formal/evening (alligator), daily (vegetable-tanned calf), water-resistance (rubber).

Remove the previous strap using a spring bar tool with gentle pressure from the sides, freeing the pin from the case. Insert the new strap by aligning the lug with the case attachments, compressing the pin until you hear a click. Verify there is no play before wearing. If inexperienced, contact a specialized service center.

Any strap with precisely 18mm lug width is compatible. Always check the vendor's specifications. Straps from generic catalogs often indicate approximate tolerances; relying on specialized artisans guarantees measurement precision, build quality, and guaranteed compatibility.

A quality leather strap (alligator, calf, shell cordovan) lasts an average of 3-5 years with daily wear, developing natural patina and character. Factors include: frequency of wear, exposure to sweat and humidity, maintenance (periodic cleaning, drying). Alligator tends to last longer; vegetable-tanned calf evolves aesthetically. Preventive replacement recommended at 4-5 years to ensure mechanical robustness of the pin.