Zenith · Defy Extreme

Strap for Defy Extreme Titanium / Blue

Takes 23 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width23 mm
Case diameter45 mm
Reference95.9100.9004/01.I001
FamilyDefy Extreme
MovementZenith caliber El Primero 9004 hours, minutes, small seconds | Chronograph | chronometer, power reserve indicator
Year2021
CaseTitanium

Spring bar

Swiss Standard universal spring bars

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

The Defy Extreme 95.9100.9004/01.I001, seen from the bench

The Zenith Defy Extreme is powered by the El Primero 9004 caliber with chronograph functions, power reserve, and chronometer certification. The movement offers hour, minute, small seconds, and chronograph indications. 23mm lugs complete the technical configuration of the model.

Frequently asked questions

What is the lug width of the Zenith Defy Extreme 95.9100.9004/01.I001?

The Zenith Defy Extreme 95.9100.9004/01.I001 features a lug width of 23mm, measured from the inner edge of one lug to the inner edge of the opposite lug. This measurement is specific to this model and ensures compatibility with the handcrafted straps available in the Milano Straps catalogue.

Which type of strap is recommended for the Defy Extreme 95.9100.9004/01.I001?

For the Defy Extreme 95.9100.9004/01.I001, recommended straps include alligator in black, grey, or white for aesthetic coherence; vegetable-tanned calf leather in dark brown or burgundy for warm-cold contrast; or shell cordovan in burgundy or black tones for constructive boldness. The choice depends on intended use and personal aesthetic preference.

How do you change a strap on a watch with 23mm lugs?

Strap replacement requires specific tools (spring bar tool). Insert the thin tip of the tool under the elastic pin (spring bar) of the lug, apply gentle pressure to release the pin, and extract the worn strap. Position the new strap by seating its ends in the lug cavities and press until the spring bar clicks audibly into place. Casati Milano offers assistance with this operation by appointment in Milan.

Which aftermarket straps are compatible with the 95.9100.9004/01.I001?

All straps with a 23mm lug width are compatible with the Defy Extreme 95.9100.9004/01.I001, provided they are crafted with premium materials (alligator, calf, shell cordovan). Milano Straps offers a dedicated collection of 23mm straps, customisable in size, thread colour, and initials according to aesthetic preferences.

How long does a leather strap last on a Zenith Defy Extreme?

Strap longevity depends on material and usage patterns. Alligator and vegetable-tanned calf typically offer 3-5 years of daily wear, developing a patina that increases aesthetic value over time. Shell cordovan has potentially longer lifespan (5-7 years) due to material density. Casati Milano guarantees straps produced for 18 months and offers regeneration services for worn leather.

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