Zenith Launches Chronomaster Sport Skeleton Line

The Zenith Chronomaster Sport collection has come a long way since its launch in 2021.

Initially introduced with a single stainless steel model featuring a black ceramic bezel - and yes, many immediately recalled well-known counterparts - it has evolved into one of the most expansive and bold collections in the segment. Over time, models with ceramic bezels in various colors, titanium cases, meteorite dials, as well as models made of precious metals and adorned with gemstones have appeared. At Watches and Wonders 2026, Zenith introduced the new Chronomaster Skeleton lineup, including two versions in rose gold and two in steel, which have received a quiet yet significant update to their bracelets. Let's first look at the innovations and then revisit the familiar technical specifications.

Dials

Instead of a traditional painted or textured dial, the Chronomaster Sport Skeleton uses a sapphire dial - with a gradient from black at the edge to transparent in the center. This subtle transition creates a sense of depth rather than bright drama. Thanks to this, the mechanism becomes the visual focal point - you are looking not just at the dial, but through it.

The steel model with a black ceramic bezel retains the signature tri-color overlapping counters, referencing the original El Primero from 1969 - gray, anthracite, and blue colors. The version with a green bezel differs in that the counters are done in gray tones, not the classic tri-color scheme, giving a more restrained look with a light tri-color accent due to the gradient of shades.

Gray counters are also used in two rose gold models - with a black ceramic bezel and with a diamond-set bezel. The markers and hands are baton-style, rhodium-plated, with facets and coated with C1 Super-LumiNova, ensuring excellent readability without compromising aesthetics. Despite the skeletonization, the watch remains legible and functional.

It is important to note the absence of the controversial date window at 4:30. This ensures the symmetry of the dial, which is particularly appreciated by experts and enthusiasts of precise compositions.

Straps and Bracelets

Now about the quiet yet significant update - it concerns only the steel models. Their bracelets are equipped with Zenith's new patented ZENCLASP folding clasp. The ZENCLASP mechanism consists of 41 components and was developed over three years, taking about 1800 hours. The construction uses ceramic balls, which provide a clear and tactile click and fixation.

The micro-adjustment system allows the bracelet length to be changed in 2.5 mm increments within a 10 mm range without tools and without removing the watch. This is a significant improvement in comfort for sports watches. Both steel versions come with a three-link steel bracelet with a ZENCLASP clasp, as well as an additional rubber strap - black for the model with a black bezel and green for the version with green.

Rubber straps in the modern Chronomaster Sport are always made with quality: they fit snugly to the case and give the watch a more sporty and integrated look when changing styles.

The rose gold version comes with a black rubber strap and a folding clasp in rose gold. The model with the diamond bezel is additionally equipped with an 18-carat rose gold three-link bracelet, matching the color of the case, but without the ZENCLASP clasp.

For those wondering, ZENCLASP will be gradually introduced into other models and references. The clasp is fully compatible with Chronomaster Sport bracelets that were not originally equipped with it, allowing owners to upgrade their watches.

Cases

The case diameter is 41 mm - standard for the entire Chronomaster Sport line. As noted by experts and owners, on the wrist, the watches feel smaller than the size on paper suggests. The lug-to-lug distance is about 47 mm, and the case thickness is 13.6 mm, which does not create discomfort when worn under a shirt cuff. If you have tried on such watches, you know this. If not - it is worth visiting an authorized dealer for a fitting.

The finish of the case is done with alternating matte and polished surfaces, which has always been a strong point of the Sport model. These are sports watches, but the quality of the finishing takes them beyond the limits of tool models. Water resistance is 100 meters, which is more than sufficient for everyday use and even swimming, despite the presence of a chronograph.

Movement

Through the front and back sapphire covers, the El Primero 3600SK movement is visible - a skeletonized version of the legendary caliber. The movement operates at a frequency of 5 Hz (36,000 vibrations per hour). Thanks to this, the central chronograph hand makes a full rotation in 10 seconds. The 10-second ceramic scale allows measuring tenths of a second with mechanical precision - without digital approximations and software interpolations. Everything happens in real-time, thanks to a complex system of gears and springs.

The column wheel, painted blue and visible through the dial, controls the start and stop of the chronograph. The horizontal coupling is fully open for view. The movement is equipped with a silicon anchor wheel for increased accuracy and durability, as well as a stop-seconds device for precise time setting. The power reserve is 60 hours - an excellent indicator for a high-frequency movement. The open rotor is decorated with a Zenith star engraving. Unlike some skeletonized rotors, here it does not obstruct the view of the movement from the back. The visibility of the movement both through the dial and the back cover is one of the key advantages of the model.

Conclusion

The Chronomaster Sport Skeleton is a logical development of the collection, demonstrating the breadth of the Sport platform's capabilities in materials, prices, and design. Skeletonization highlights the central role of the El Primero 3600 movement - the main element of any Zenith chronograph.

Whether this model suits you depends on your preference regarding open dials. Some appreciate the transparency and visual complexity, others prefer the classic restraint of a solid dial. In any case, the new line expands the choice of reliable and stylish Chronomaster Sport models, and the introduction of the ZENCLASP clasp and the removal of the date window at the 4:30 position are important improvements enhancing comfort and aesthetics.

The main novelty is the first skeletonized design in the Chronomaster Sport line, and an even more significant event for buyers is the introduction of the ZENCLASP clasp, now available for steel Skeleton models, with plans to introduce it to other watches and the possibility of installation on already purchased bracelets.

Technical Specifications and Prices for Zenith Chronomaster Sport Skeleton

This model combines Zenith's innovations and traditions, offering both aesthetic and technical excellence for discerning collectors and sports chronograph enthusiasts.