Zenith
Defy 18.9000.9004/71.M9000— lug 23mm

The Zenith Defy 18.9000.9004/71.M9000 features a lug width of 23mm. This unconventional measurement reflects the bold proportions of the case and requires dedicated straps. To verify compatibility, measure the internal space between the case lugs: the value must correspond precisely to 23mm to ensure secure attachment without gaps or distortion.

Alligator in black or cognac brown represents an excellent choice for the Defy in rose gold, creating a dramatic contrast that amplifies the jewellery-like character. Vegetable-tanned calf develops a patina over time and dialogues elegantly with the warm tone of the gold. For those seeking sartorial versatility, taupe-grey calf introduces subtle alterity that emphasises the case's modernity. Each selection must consider the interplay between the case, dial luminosity, and strap tone.

Changing the strap on the Defy 18.9000.9004/71.M9000 follows the standard procedure for watches with bayonet or screw-in lugs. Position the watch on a soft surface, then use a dedicated tool (spring bar remover) to gently compress the lateral lug pins. Never force directly; the correct motion is light compression followed by rotation. For straps with 23mm lug width, ensure the pins are fully seated before wearing the watch.

Yes, numerous artisanal manufacturers offer 23mm straps that guarantee full compatibility with the Defy. Milano Straps offers a dedicated collection of 23mm straps in alligator, calf, technical rubber, and NATO fabrics, all customisable in size, initials, and thread colour. The Casati Milano atelier further creates bespoke straps with personal hide selection and an 18-month warranty, providing a complete sartorial experience.

The longevity of a leather strap depends on the quality of tanning and intensity of use. Superior alligator guarantees 5–7 years of daily wear before requiring structural replacement, whilst vegetable-tanned calf, though developing a desirable patina, tends to wear slightly faster (3–5 years). Shell cordovan, thanks to its dense fibrous structure, can exceed 7–8 years without significant compromise. Factors such as prolonged sun exposure, moisture, and frequency of wear influence overall longevity.