Zenith Defy Skyline Tourbillon Skeleton: At The Top End of The Skyline

With the Defy Skyline Tourbillon Skeleton, unveiled at LVMH Watch Week earlier this year, Zenith is not merely expanding the Skyline collection but setting a clear benchmark for its pinnacle. It combines the familiar Skyline architecture with an open-worked and embellished tourbillon calibre and a case crafted entirely from rose gold. With a limited edition of just 50 pieces, Zenith presents the Defy Skyline Tourbillon, its first skeletonised tourbillon within the collection.

Rose gold, high frequency, and open-worked movement

The key specifications are easy to summarise: the case measures 41 millimetres in diameter, is water-resistant to 10 ATM (100 m), and is crafted entirely from rose gold. The timepiece also comes with a blue rubber strap featuring a star pattern and a rose gold folding clasp. At the heart of the watch is the El Primero 3630 SK, a skeletonised automatic movement with a frequency of 5 Hz (36,000 vibrations per hour), a 50-hour power reserve, and a one-minute tourbillon at 6 o’clock. The tourbillon cage alone is assembled from 56 individual parts, and the rotor of the automatic calibre is crafted from solid gold.

In terms of design, Zenith showcases the timepiece’s mechanics to maximum effect. The mainplate and bridges are coated in blue PVD, with rhodium-plated and bevelled edges. Added to this are two striking, architecturally styled bridges at 10 and 2 o’clock, which further structure the movement. The Zenith star is integrated directly into the openwork construction, with the tourbillon forming its visual focal point. The watch thus derives its appeal less from a classic dial than from its constructed, almost graphic effect.

However, this new model is particularly interesting when viewed in context. It is not by chance that Zenith is launching this watch at this particular moment, but it is at a point when the Defy Skyline collection has clearly come of age.

From a technology push to a platform

The real starting point dates back to 2017. While the Defy had already made its comeback in 2006, Zenith signalled a fresh start for the modern version with the launch of the Defy El Primero 21. The watch was, above all, a technical statement: a chronograph capable of measuring 1/100th of a second, with a design that Zenith deliberately positioned at the time as an expression of extreme precision and forward-thinking. The message was clear: Defy was no longer to be merely a sub-line, but the brand’s more experimental, progressive platform.

In 2018, Zenith continued this repositioning with the Defy Classic. The precise naming is key here: officially, the brand launched the Defy Classic, not primarily a separate model called the ‘Defy Classic Skeleton’. At the same time, this generation certainly included open-worked variants and established the star-shaped, architectural design language that later became important for the skeletonised Defy models. Zenith described the Defy Classic at the time as the ‘gateway to the future of watchmaking’. That was precisely its function: it translated the Defy El Primero 21’s demonstrative technical ambition into a more wearable, widely accessible form.

The most significant step for the current Defy Skyline Tourbillon came in 2022 with the launch of the Defy Skyline. It was here that the Defy acquired the basic design it retains to this day. Zenith introduced a modern integrated sports watch featuring a faceted case architecture, a striking polygonal bezel, and a star-patterned dial. Above all, however, this marked the debut of the El Primero 3620 calibre with its characteristic 1/10-second display at 9 o’clock, which is driven directly by the 5 Hz escapement and completes one rotation every ten seconds. It was precisely this detail that made it clear that Zenith did not view the Skyline as a mere design line, but as a fundamental form with clear El Primero DNA. 

2023: The skyline reveals its true colours

In 2023, Zenith expanded the collection with the Defy Skyline Skeleton. This was the first time that the Skyline range had featured a skeletonised version, in which the character of the watch was defined not only by the case and dial, but also by the movement itself, which took centre stage. The Skyline thus became more technically and expressively sophisticated, and was more clearly positioned within the Defy line. The new Defy Skyline Tourbillon Skeleton builds precisely on this development.

This effectively set the tone. The Skyline was now no longer just the sporty, urban face of the Defy, but also a platform for more elaborately designed mechanical architecture. This is precisely where the new Defy Skyline Tourbillon Skeleton comes in.

Why Zenith is launching this watch right now

This is precisely the crux of the matter: the Defy Skyline Tourbillon Skeleton feels less like an isolated special edition and more like a logical evolution within the range. Zenith has brought together three key developments in this model, which the brand has systematically built up over recent years:

• the high-frequency nature of the El Primero
• the open Defy architecture
• the Skyline as a modern base

To put this into context, let’s look back to 2025: by then, Zenith had already taken the Skyline to a new level of technical complexity with a Defy Skyline Tourbillon in rose gold. When it was officially launched, the Skyline was explicitly described as a contemporary icon of the brand, which has rapidly become established since 2022 and is now available in a variety of versions. The new Tourbillon Skeleton is therefore not Zenith’s first attempt to position the Skyline at a higher level, but rather the next stage in a process that the company had already begun.

There is another point to consider: the Defy Skyline has now clearly become too significant to remain confined to classic three-hand and skeleton models. Traditional watchmakers typically introduce such flagship models once a line has been formally established, is commercially viable and has gained sufficient recognition in the market. Zenith now seems to attribute this level of maturity to the Skyline. The fact that the new Tourbillon Skeleton is being launched in rose gold further underscores this intention. The aim is not only to impress technically, but also to establish a position within the collection’s hierarchy.

The bigger picture

Using the El Primero in this watch makes perfect sense. Zenith thus firmly anchors the Defy Skyline Tourbillon Skeleton in the technical tradition with which the brand is still identified today: high frequency, precision, and a movement that is not concealed, but deliberately showcased as the brand’s flagship.

This is precisely why the watch transcends its basic specifications. It is not merely another limited-edition variant, but a model through which Zenith unites the key elements of its current Defy strategy: the Skyline as a modern platform, the open architecture of the skeleton models, and the tourbillon as a clear step to the pinnacle of the range. Here lies its true significance within the collection.

www.zenith.com