Zenith Defy Extreme Diver
95.9601.3620/51.I301
*This timepiece comes with two complimentary straps.
2-year warranty, extendable to 5 years. Register here
Free Home Delivery Across India
The Zenith Defy Extreme Diver is a high-performance timepiece built for underwater exploration. Encased in a robust 42.5mm titanium case with an angular design, it is engineered for extreme conditions with a helium escape valve and an impressive 600-metre water resistance. The rotating blue ceramic bezel ensures precise dive tracking, while the blue star-patterned dial with luminescent markers and hands provides optimal legibility in deep waters. At its core, the El Primero 3620 SC automatic movement delivers a 60-hour power reserve, ensuring reliability in demanding environments. Designed for adaptability, this diver’s watch features an interchangeable strap system, offering a titanium bracelet, a durable rubber strap, and an eco-friendly fabric strap made from recycled fishing nets. A fusion of cutting-edge materials and Zenith’s legendary precision, the Defy Extreme Diver is the ultimate companion for professional divers and adventure seekers alike.
Full Specification
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Brand ZenithCollectionDefySeriesExtreme DiverModel No95.9601.3620/51.I301
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MovementFeatures Date, Helium Escape ValveMovement AutomaticCalibre El Primero 3620 SCCaseCase Size 42.5 mmCase Thickness 15 mmCase Shape RoundCase Material Titanium & CeramicBezel Unidirectional Rotating BezelCase Back See-through Case BackGlass Material Sapphire CrystalDialLuminosity On Hands, Hour Markers & BezelDial Colour BlueHands BatonIndexes BatonStrapStrap Material RubberStrap Colour BlueInterchangeable Strap YesClasp Type Pin BuckleBuckle/Clasp Material TitaniumOtherGender MenWater Resistance (M) 600Warranty Period 2-year warranty, extendable to 5 years. Register hereCountry of Origin Switzerland
About the Zenith Defy Collection
Zenith's story began in 1865 in Le Locle, Switzerland, founded by Georges Favre-Jacot. Early on, Zenith made a mark by centralising all aspects of watchmaking—cases, movements, and assembly—under one roof. In 1969, Zenith introduced the Defy collection. The original Defy was known for its distinctive case and high water resistance, embodying a "bank vault" style. Although the Defy evolved into a more rugged variant of the El Primero over time, it gained renewed attention with the launch of the Defy Revival.
Design Evolution
The Defy series started with the Defy reference A3642 in 1969, known for its chunky octagonal case and unique 14-sided bezel, reflecting a rugged style. Fast forward to 2017, the Defy El Primero 21 Chronograph and the 2021 Defy Extreme highlight Zenith's focus on high-frequency chronograph technology and durable design. The 2021 Defy Extreme showcased Zenith's design prowess with a titanium case and an aggressive, avant-garde look, featuring integrated bracelets with a quick-change mechanism. In 2022, the Defy Skyline was introduced with a refined stainless steel case, reinterpreting the original Defy's geometric design to resemble modern design. In 2024, Zenith surprised its patrons by launching a diver's watch, a category that had been absent from the brand's catalogue for some time. The Defy Extreme Diver is a robust aquatic timepiece, water-resistant up to 600 metres and features a helium escape valve.
Advanced Timekeeping
The El Primero Calibre 9004 powers the Defy El Primero 21, which measures time to the 1/100th of a second, a remarkable feat among mechanical watches. The Defy Inventor, introduced in 2019, employs a silicon oscillator that does not require lubrication, increasing accuracy to 0.3 seconds every day. The Defy Skyline Skeleton, an astounding iteration, features a skeletonised El Primero 3620 movement visible via a star-patterned dial as well as a unique sub-dial that completes one revolution every 10 seconds. The Defy Extreme Tourbillon has two tourbillons—one for timekeeping and one for the chronograph—highlighting Zenith's commitment to advanced timekeeping technology.

ABOUT THE MOVEMENT
The Zenith El Primero 3620 SC is a high-precision, automatic movement. It is an evolution of the iconic El Primero line, and the “SC” designation in this variant denotes its central seconds features. The movement operates at a high beat frequency of 5 Hz (36,000 vibrations per hour) that allows for greater precision and a smoother sweep of the second hand. It boasts a power reserve of approximately 60 hours and features a bi-directional automatic winding system. The El Primero 3620 SC is composed of a large number of intricate components, assembled and finished meticulously. The star-shaped rotor is finely decorated and is visible through a transparent case back on watches housing this movement.

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- Brand Zenith
- Reference El Primero 3620 SC
- Movement Automatic
- Display Analog
- Power Reserve Approx. 60 hours
- Jewels 27
- Frequency 36000 bph
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