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DEFY Skyline Skeleton

DEFY Skyline Skeleton in a 41mm steel octagonal case with a faceted bezel, featuring a blue open dial revisiting the emblematic ZENITH four-pointed star. Powered by the El Primero 3620 SK high-frequency automatic manufacture skeleton movement with the very first 1/10th of a second indicator. Interchangeable steel bracelet and blue patterned rubber strap. A second strap is offered to fully experience the interchangeability of the watch.

Ref 03.9300.3620/79.I001


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Technical features

  • Diameter 41 MM
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Time to Reach Your Star


Drawing inspiration from modern cityscapes where structures and light are bound in a constantly moving interplay, the DEFY Skyline Skeleton opens a whole new world of possibilities to what a skeleton watch can be. Reprising the octagonal geometry of the early DEFY models of the 1960s, the angular steel case of the DEFY Skyline Skeleton retains the same DNA of robustness and durability as its predecessors while bringing an edgier and more architectural aesthetic. The harmoniously symmetrical open dial takes on the form of a four-pointed stars, in a nod to the ZENITH “double Z” logo of the 1960s. Its high-frequency automatic El Primero calibre provides a constantly running 1/10th of a second counter.
The DEFY Skyline’s automatic manufacture movement beats at a high frequency of 5Hz (36’000 VpH) and is endowed with a highly efficient bi-directional automatic winding mechanism that delivers a power reserve of 60 hours.


Conceived for an ever-fast-moving world, the El Primero 3620 SK automatic high-frequency manufacture movement drives the 1/10th of a second hand directly from the escapement, which beats at 5Hz (36’000 VpH), making it a “natural” fraction-of-a-second indication. The DEFY Skyline Skeleton stands out as the first and only openworked watch to feature this exceptional function.

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