Zenith Defy Transparent Sapphire Watches

Zenith's two latest timepieces aren't just one-of-a-kind masterpieces — the new limited-production editions come with a once-in-a-lifetime opportunity. The 46 mm Zero Defy 21 Tourbillon Sapphire and 46 mm Defy Zero-G Sapphire both come with transparent cases that put their movements on full display. Each of the 150 units will also come with a parabolic flight courtesy of Novespace in Bourdeaux, France. Consisting of 15 passes, each passenger will experience zero-g flight, going weightless for over a minute each time. Zenith has constructed the Defy chronographs to perform flawlessly, even without gravity. The Defy Zero-G's Gravity Control movement contains a gimbaled regulator that allows for precise timekeeping no matter the position or shock load. A dial made of meteorite and aventurine glass reveals a hand-painted face with starscape, Mars in the small seconds display, and a moon-like texture. Each watch is limited to just 10 units.