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Returning to the essence of the Defy collection and the historical references that continue to serve as a source of inspiration for the contemporary collection of the same name, Zenith is unveiling the second Defy Revival model with a remake of the A3691, based on the 1971 reference. With its vibrant red gradient-effect dial and rugged geometric case, the Defy Revival A3691 becomes the first Defy Revival model in the permanent collection. Reproduced in stunningly accurate detail, the timepiece features a sapphire display back showing the automatic Elite 670 manufacture movement, operating at a frequency of 4 Hz (28,800 VpH) and providing an autonomy of 50 hours.