Here are the top 10 world's most expensive watches:

1.  The Graff Diamonds Hallucination: This watch is worth $55 million and is made up of a variety of colored diamonds.

2.  The Paul Newman Rolex Daytona: This vintage watch sold for $17.8 million at auction in 2017.

3.  Patek Philippe Grandmaster Chime: This watch sold for $31 million at auction in 2019 and features 20 different complications.

4.  Breguet Grande Complication Marie-Antoinette: This watch was commissioned for Marie-Antoinette but was not completed until 1827. It was stolen from a museum in 1983 and later recovered. The watch is now worth an estimated $30 million.

5.  Jacob & Co. Billionaire Watch: This watch is worth $18 million and is covered in 260 carats of emerald-cut diamonds.

6.  Hublot Big Bang Diamond: This watch is worth $5 million and is covered in 1,282 diamonds.

7.  Louis Moinet Meteoris: This watch is made up of four unique pieces, each featuring a different meteorite. The set is worth an estimated $4.6 million.

8.  Chopard 201-Carat Watch: This watch features 201 carats of colored diamonds and is worth an estimated $25 million.

9.  Rolex GMT Master II Ice: This watch is covered in 30 carats of diamonds and is worth $485,350.

10.  Jaeger-LeCoultre Joaillerie 101 Manchette: This watch is worth $26 million and is covered in diamonds and sapphires. It features a tiny movement that measures just 14mm by 4.8mm.