The Le Brassus watch brand is heavily focused on selling Royal Oaks that are waitlisted around the world, effectively giving them control of who buys and who doesn’t. Back in the 1980s, Audemars Piguet was more focused on horology than hype, though, and in 1986 they introduced the world’s first automatic tourbillon wristwatch, powered by caliber 2870 and housed in an ultra-thin case measuring just 5.3 mm in thickness. The tourbillon cage, which measures 7.2 mm in diameter, is still one of the smallest in the world today, and one of the lightest at 0.123 grams.