Zenith
El Primero 51.2080.400/69.C494— lug 21mm

The lug width is 21mm. This measurement refers to the distance between the inner lugs and ensures precise compatibility with straps designed for this specific model. It is essential not to confuse this dimension with the case diameter (42mm).

Alligator is the ideal choice: the scale texture dialogues elegantly with the chronograph's complexity, and the leather's mechanical resistance is superior to calf. Alternatively, shell cordovan offers exceptional hardness and vertical grain that resists scratches; vegetable-tanned calf is perfect for those seeking sobriety and natural patina development over time.

Use a spring bar tool or flat screwdriver to compress the attachment pins (spring bars) positioned horizontally between the lugs. Gently lift the worn strap until the pin slides free from the seats. Insert the new strap by aligning the pins to the same positions and release slowly. Verify that both pins are firmly seated before wearing the watch.

Any strap manufactured for 21mm lugs is compatible with this model. Milano Straps offers a wide selection of straps in alligator, calf, shell cordovan, and technical rubber, all customisable in length, initials, and stitching colour. Artisanal quality ensures the strap integrates perfectly without any play.

A quality artisanal alligator strap lasts an average of 3-5 years with moderate daily use. Shell cordovan, being denser, can last 6-8 years. Vegetable-tanned calf tends to show visible wear (creases, cracking) after 2-4 years, but the patina it develops is part of its appeal. Durability depends on climate, frequency of use, and leather maintenance.