The Ulysse Nardin Executive Skeleton Tourbillon is a luxury men's mechanical watch featuring a manual winding movement. It has a grey titanium case paired with a blue leather strap incorporating carbon structure elements, and features a fixed blue ceramic bezel. The skeleton dial displays an analog design with blue hands and index-Roman numeral hour markers. Powered by the Ulysse Nardin Calibre UN-171 hand-wound mechanical movement containing 23 jewels operating at 18000 vph (vibrations per hour) for a power reserve of about 170 hours. The sapphire crystal provides scratch resistance and clarity, with a transparent case back allowing visibility of the intricate mechanics. This round watch has a 45mm case size equipped with a folding buckle clasp and is water-resistant up to 30 meters (100 feet). Features include hour, minute, and flying tourbillon hands. Limited edition at only 50 pieces, it embodies fine Swiss horology.