one of the most exclusive watches ever made was sold by Patek Philippe for an astounding $11,000,000 USD in 1999 at a New York auction
Vacheron Constantin
The best example of their mechanical genius would be the recently released Vacheron Constantin reference #57260 also known as the world's most complicated watch , according to Forbes it has an estimated value at $8,000,000.
Blancpain
Blancpain established the diving watch industry with their legendary Fifty Fathoms timepiece, the world's first diver's watch. Blancpain has since created other superb collections such as Le Brassus, Leman, Villeret, Novelties, Specialties, and Sport.
Ulysse Nardin
Ulysse Nardin's marine chronometers, such as the Maxi Marine Chronometer and the maritime Chronograph, are well-known. Ulysse Nardin has carved itself a niche in timekeeping that shines brighter than the North Star with their maritime clocks.
Omega
Omega SA is one of the most well-known luxury watch brands. They had their Seamaster watches featured in important films over the years, such as every James Bond film since Goldeneye starring Pierce Brosnan and every "007" film starring Daniel Craig.