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 … Read more