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Zenith Defy Extreme Diver

SKU: 95.9601.3620/51.I301 

  • $11,300.00
  • $1,000.00
or call: +1 (650) 347-2221
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A Defy for the deep-sea

While inspired by a long line of Defy divers from 1969 onwards, the Zenith Defy Extreme Diver is as modern as they come. Its singular and highly intricate design serve to enhance its depth-defying performance, which was conceived to take on extreme conditions where ice, water and mist present a host of challenges. Its 42.5mm angular case is crafted in titanium, a metal that not only boasts a significant weight-to-strength ratio but is also highly resistant to corrosion from salty seawater. The case is equipped with a helium escape valve for saturation diving. Above the fixed dodecagonal bezel, the ceramic unidirectional rotating bezel features grooved edges for a better grip when operating – even with gloves on. The bezel is engraved and filled with Super-LumiNova and bright colors for effortless reading underwater where light is scarce.

The oversized screw-down crown feature is protected by titanium crown-guards on either side. Just like the historical Defy A3648 from 1969, the Defy Extreme Diver is rated to 600 meters (60 ATM) of water-resistance, which happens to be 1,969 feet – a symbolic number for the Defy diver. It meets the ISO 6425 requirements for professional diver watches, which include ISO 764 for paramagnetism as well as ISO 1413 for shock-resistance, making it a comprehensive diver’s watch suited to the most demanding conditions.

Legibility is a key factor in the Defy Extreme Diver – and it shows. The dial’s oversized hands and applied hour markers feature three different pigments of “X1” grade Super-LumiNova with light emissions in blue, green and orange, making it easy to distinguish between the functions (hours, minutes and seconds). The bright orange accents are a nod to historical Defy diver models.

The Defy Extreme Diver is powered by the El Primero 3620-SC automatic high-frequency manufacture calibre with 60 hours power reserve, visible through a sapphire display back – an uncommon feature among diver’s watches. This version of El Primero features a paramagnetic escapement with key components in non-metallic silicon.
Completing the Defy Extreme Diver is its titanium three-link bracelet as well as two supplied straps. The first additional strap is in FKM rubber, matching the dial colour with a Cordura-effect texture that features vents on the side, allowing water to pass through. In line with Zenith's HORIZ-ON initiative to reduce the brand’s environmental impact and produce more sustainably, the Defy Extreme Diver also comes with an extra-long strap made of recycled fishing nets, intended to be worn over a wetsuit. It features specific end-pieces to pass the single-piece strap through and under the case for a secure fit.


  • Case: 42.5mm titanium (15mm thick)
  • Dial: Starry sunray-patterned, rhodium-plated, faceted and coated with SuperLuminova X1, rhodium-plated, faceted and coated with SuperLuminova X1
  • Sapphire Crystal front, exhibition caseback
  • Movement: El Primero 3620 SC
  • Time Display: Hours & Minutes in the Center. Central second hand. Date at 3 o'clock
  • Power reserve: 60 hours
  • Water Resistance: 600 meters (1,969 feet)
  • Strap: Interchangeable strap system and three straps: three-link titanium bracelet, rubber dive strap and recycled nylon Velcro strap