Zenith
Defy 18.9000.8812/79.M9000— lug 20mm

The lug width of the Zenith Defy 18.9000.8812/79.M9000 measures exactly 20mm. This dimension was chosen to maintain correct proportions between the 44mm case and the wrist, ensuring balanced visual harmony. Verify the measurement with a digital caliper by positioning the tips in the spring bar seat at the deepest point.

For the Zenith Defy 18.9000.8812/79.M9000 in rose gold 44mm, we recommend alligator niger with natural patina or cognac English calf. Alligator amplifies the luxury character of rose gold through its geometric grain, while calf offers chromatic versatility and seasonal adaptability. Structured FKM rubber is the ideal choice for warm environments and sports activities.

Strap replacement requires removal of the spring bar from the case lugs. Use a thin, flat tool (spring bar tool) to gently push the spring bar downward, freeing the end. Remove the old strap and insert the new one by aligning the lug in the seat, then release the spring bar. Verify that the 20mm strap is secure and has no play.

Yes, the Zenith Defy 18.9000.8812/79.M9000 accepts aftermarket straps with 20mm lugs. It is essential to verify the exact measurement with a digital caliper before purchase, as even half a millimeter of deviation compromises fit. Premium artisanal straps guarantee perfect compatibility and lasting durability.

A premium leather strap (alligator niger or English calf) maintains functionality and aesthetics for 3–5 years of daily wear, developing a natural patina that increases character. Durability depends on climate, cleaning frequency, and rotation with other straps. The Casati Milano atelier offers an 18-month warranty and leather regeneration services after the first year of use.