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The Zenith Defy Skyline Skeleton 18.9300.3620/81.I001 was introduced in 2025 as a rose-gold variant of the openworked Skyline configuration. The 41 mm case is 11.60 mm thick with a lug-to-lug measurement of 46.30 mm and water-resistance of 10 ATM. The integrated rose-gold H-link bracelet is fitted with a folding clasp, and a black rubber strap with matching clasp is supplied. Both use the manufacturer’s tool-free interchangeable-strap system. The watch features an openworked dial in matching rose-gold tones. Functions comprise central hours and minutes and a 1/10th-of-a-second counter positioned at 6 o’clock. The hands and hour markers are solid gold or gold-plated, faceted, and filled with Super-LumiNova SLN C1. The El Primero 3620 SK calibre runs at 36,000 vph (5 Hz) with a 55-hour power reserve. It incorporates a silicon escape wheel and lever and uses a rose-gold oscillating weight with satin finishing. The movement architecture is visible from both the dial side and through the sapphire display back.