Price: $1.4 million

Part of the Tour de I'lle series, Vacheron Constantin’s Rose Gold piece has been called the world’s most complicated wristwatch. With an alligator leather strap, snap-in caseback embellished with Sapphire crystals, and a hand-guilloché motif on the back dial, the watch has 834 individual parts and took over 10,000 hours to design, and no piece is the same.