Technical Archive

Zenith
Defy 95.9000.9004/78.M9000— lug 23mm

Zenith Defy 95.9000.9004/78.M9000: 23mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Defy El Primero 21 Titanium / Skeleton / Bracelet

Artisanal Note

"This model requires a precise 23mm lug width to preserve the original sartorial balance."

Technical Specifications

Zenith 95.9000.9004/78.M9000
Lug Width
23 mm

The essential strap measurement.

Browse 23mm straps →
Reference

95.9000.9004/78.M9000

Movement

Zenith caliber El Primero 9004 Hours, Minutes, Small Seconds | Chronograph | Chronometer, Power Reserve Indicator

The Heritage

The Zenith Defy reference 95.9000.9004/78.M9000 mounts the El Primero 9004 caliber with chronograph, chronometer and power reserve indicator functions. The movement indicates hours, minutes, small seconds and offers chronometer certification. The watch features 23mm lugs for the strap.

FAQ

What is the lug width of the Zenith Defy 95.9000.9004/78.M9000?

The lug width (spring bar distance) of the Zenith Defy 95.9000.9004/78.M9000 is 23mm. This non-standard dimension requires bespoke straps specifically constructed for this attachment. 20mm or 22mm straps cannot be adapted without compromising the fit between the lugs and the strap.

Which strap pairs best with the Zenith Defy 95.9000.9004/78.M9000?

The Zenith Defy, thanks to its contemporary geometry and titanium case, accommodates both formal and sports straps. A grained alligator leather in black emphasises the tech-chic character; vegetable-tanned calf leather with patina plays on the artisanal-versus-futuristic dichotomy; a reinforced nylon NATO strap in tactical configurations highlights the instrumental vocation. Choice depends on context: formal, casual, or outdoor use.

How do I change the strap on the Zenith Defy 95.9000.9004/78.M9000?

The strap is replaced by extracting the spring bars (the spring-loaded pins that affix the strap to the case lugs). For the Defy's 23mm lugs, a spring bar removal tool suffices: press on one side of the lug to release the spring, then extract. The new 23mm strap is inserted by aligning the lug holes with the spring bars until they click into place. The operation demands care: whilst titanium is durable, the spring bars are precision components.

Can I use an aftermarket strap compatible with the Zenith Defy 95.9000.9004/78.M9000?

Yes, provided it is specifically constructed for the 23mm lug width. Quality artisanal aftermarket straps (such as those offered by Milano Straps) are fabricated to the same tolerance and material standards as original Zenith straps. Compatibility is assured if the strap is constructed for 23mm; material quality (leather, rubber, textile) affects durability and aesthetic ageing over time.

How long does a leather strap last on the Zenith Defy 95.9000.9004/78.M9000?

A premium leather strap (alligator, vegetable-tanned calf, shell cordovan) typically lasts 4–6 years with daily wear and ordinary care. Factors affecting longevity: exposure to sunlight, moisture, perspiration and cleaning frequency. A reinforced nylon NATO strap, more resistant, may last 7–10 years. The Casati Milano atelier provides an 18-month warranty on all bespoke straps, with maintenance and reconditioning options available.

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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The atelier's website: casatimilano.com