Zenith
Defy 33.9000.9004/78.R582— lug 23mm

The lug width of the Zenith Defy 33.9000.9004/78.R582 is 23 millimetres. This non-standard measurement is integrated into the structural design of the case and requires dedicated straps to ensure harmonious fit and mechanical stability of the lugs.

Alligator leather dyed in deep blue or dark brown is the most balanced choice: the natural grain dialogue with the modern titanium geometry, developing characteristic patina over time. Vegetable-tanned calf leather offers daily versatility and controlled natural ageing. Shell Cordovan is reserved for those who understand the potential of ultra-high-density leather.

The Defy uses a standard straight lug attachment system (23mm spring bar) accessible from the back of the case. Remove the caseback following original instructions, proceed with spring bar replacement using dedicated tools without exerting pressure on the case, and reinstall the caseback ensuring proper sealing. For critical operations, entrust an authorised service centre.

Yes, provided the strap respects exactly the 23mm lug width and is manufactured to construction standards comparable to the original. European artisanal straps in full-grain leather, with solid deployante closures and natural silk stitching, guarantee mechanical compatibility and superior aesthetic longevity.

A high-quality leather strap (alligator, cordovan, vegetable-tanned calf) withstands 4-7 years of daily use, provided regular maintenance (avoid prolonged baths, dry after intense perspiration, condition with specific creams every 12 months). Structural ageing varies depending on climate, frequency of use and care routine.