Zenith · Defy Extreme

Strap for Defy Extreme Diver Shadow / Bracelet

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter43 mm
Reference97.9600.3620/21.I001 (aka: 97.9600.3620/21.I300, 97.9600.3620/21.I103, 97.9600.3620/21.I001)
FamilyDefy Extreme
MovementZenith caliber El Primero 3620 SC hours, minutes, seconds | date
Year2025
CaseTitanium, Ceramic

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Defy Extreme 97.9600.3620/21.I001 (aka: 97.9600.3620/21.I300, 97.9600.3620/21.I103, 97.9600.3620/21.I001)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Defy Extreme 97.9600.3620/21.I001 (aka: 97.9600.3620/21.I300, 97.9600.3620/21.I103, 97.9600.3620/21.I001), seen from the bench

The Zenith Defy Extreme Diver Shadow (ref. 97.9600.3620/21.I001) features a 42.50 mm Grade 5 titanium and high-tech ceramic case with a 20 mm lug width. It houses the El Primero 3620 SC automatic chronograph movement, capable of 1/100-second measurements at 5 Hz frequency, with a 50-hour power reserve. The case depth is 12.6 mm.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only