The Zenith Defy Skyline Skeleton is a modern take on the Defy Skyline, showcasing a fully skeletonized movement adorned in warm golden hues, which distinguishes this model within the series. It maintains the defining angular case design and integrated-bracelet style typical of the contemporary Defy Skyline range, with a focus on highlighting the mechanical workings and contrasting materials. Launched in 2023, it bears the reference number 49.9300.3620/07.I001.

The case, crafted from stainless steel, has a diameter of 41 mm and features the bold geometric shapes emblematic of the Defy Skyline collection. Its octagonal mid-case is complemented by a twelve-sided bezel, both exhibiting alternating brushed and polished finishes that accentuate the architectural aesthetic. The integrated bracelet mirrors this blend of textures and is designed with a quick-change system for easy strap swaps without the need for tools, while also offering water resistance up to 100 meters.

The skeletonized dial allows a glimpse into the intricate movement structure, highlighted by a star-shaped bridge that nods to Zenith's signature emblem. The golden-toned movement parts create a striking contrast against the steel case and darker aspects of the dial. Its openworked design reveals the gear train and regulating organ, with faceted hour markers set on a fixed outer chapter ring, treated with Super-LumiNova for enhanced visibility. The hands share the same faceted, luminous style, and the absence of a date display preserves the watch's symmetry and clarity.

At its heart lies the automatic El Primero 3620 SK caliber, which operates at a frequency of 5 Hz, equating to 36,000 vibrations per hour. This movement features a silicon escape wheel and lever for improved efficiency and resistance to magnetic fields, providing a power reserve of about 55 hours via its bidirectional winding mechanism. A unique attribute is the 1/10-of-a-second indicator driven by the escapement, visually showcasing the movement's high-frequency capability with a full rotation every ten seconds. The caliber can be appreciated from both the dial and through the transparent sapphire caseback, while the openworked oscillating weight follows the star motif and matches the movement's golden design. The overall appearance embraces a modern, technical style, emphasizing structured functionality over ornamental decoration.