Zenith · Defy

Strap for Defy Classic Titanium / Skeleton / Alligator

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

Lug width20 mm
Case diameter41 mm
Reference95.9000.670/78.R584
FamilyDefy
MovementZenith caliber Elite 670 SK hours, minutes, seconds | date | skeleton
Year2018
CaseTitanium

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 95.9000.670/78.R584

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Defy 95.9000.670/78.R584, seen from the bench

The Zenith Defy 95.9000.670/78.R584 is a sports watch with an octagonal titanium case of 41 mm diameter and 20 mm lug width, featuring the Elite 670 SK skeleton movement running at 36,000 vph. The open architecture reveals the mechanical components including the balance wheel and hairspring, transforming the movement into a functional sculpture. Water resistant to 100 meters, this Defy model combines contemporary design with technical precision.

Frequently asked questions

What is the lug width of the Zenith Defy 95.9000.670/78.R584?

The lug width of the Zenith Defy 95.9000.670/78.R584 measures exactly 20 millimeters. This measurement is critical: a strap of 19 or 21 millimeters will not be compatible with the integrated titanium case attachment. To verify with precision, use a digital caliper positioned perpendicularly between the internal shoulders of the lugs.

Which strap is the best choice for the Zenith Defy 95.9000.670/78.R584?

There is no single "best" strap in absolute terms, but rather optimal choices based on intended use. For elegance: black alligator or cognac brown. For tactile character and intentional patina: calf with pronounced grain. For everyday sportiness: textile NATO in navy blue or charcoal grey. For marine or humid environments: black or charcoal grey rubber. The octagonal geometry of the case pairs naturally with regular textures such as alligator.

How do you change the strap on the Zenith Defy 95.9000.670/78.R584?

The Defy 95.9000.670/78.R584 features an integrated lug, meaning the lug width is part of the case. The strap is changed by removing the spring bars (splines) that secure it to the lug shoulders. Use a dedicated strap removal tool to push the spring bars and extract the strap. Proceed with care to avoid scratching the titanium. The new 20mm strap is inserted by aligning the holes and reinserting the spring bars until the click closure is felt.

Are there compatible and reliable aftermarket straps for this model?

Yes, but with caution. Compatible aftermarket straps must strictly comply with the 20mm measurement and length specifications (typically 120mm from the buckle to the first hole). Milano Straps offers straps certified for compatibility and construction quality. Avoid non-specialized suppliers: a poorly constructed strap can scratch the titanium lug or fail during wear. Opt for first-grade leathers (certified alligator, European calf) and double stitching with cotton or silk thread.

How long does a leather strap last on the Zenith Defy 95.9000.670/78.R584?

Durability depends on the material and intensity of use. High-quality alligator resists 5-7 years with ordinary maintenance (regular drying, no prolonged water exposure). Calf, more delicate, lasts 3-5 years before requiring replacement, but develops a fascinating patina. Durable textile NATO can reach 10 years without significant deterioration. Rubber, while robust, can lose elasticity after 5-6 years of daily use in wet environments. Longevity increases if the strap is constructed with double stitching and a robust deployant clasp, standard features of Milano Straps.

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