Launched in 2025, the Zenith Defy Skyline Tourbillon 18.9301.3630/67.I001 presents a stunning 41 mm case crafted from rose gold, showcasing the El Primero 3630 calibre within. Its proportions include a thickness of 11.60 mm and a lug-to-lug measurement of 46.30 mm, while being water-resistant up to 10 ATM. This model is elegantly paired with an integrated rose-gold H-link bracelet featuring a folding clasp, alongside a complementary brick-red rubber strap, both designed for seamless tool-free changes by Zenith.

The brick-red dial features a sunray finish, decorated with engraved stars that point towards the tourbillon visible at the 6 o'clock position. It indicates the time through central hour and minute hands, both of which are faceted and enhanced with Super-LumiNova SLN C1 for improved visibility. The captivating tourbillon, designed in the shape of Zenith's double-Z star, makes a full rotation every 60 seconds. At its core, the El Primero 3630 operates at a frequency of 36,000 vibrations per hour (5 Hz), and offers a power reserve of 50 hours, boasting a star-shaped openworked rotor in rose gold, complete with satin finishes and a striking 3D laser-engraved motif emanating from the tourbillon.