5. Breguet

Founded in 1775 by Swiss-French horologist Abraham-Louis Breguet, this esteemed watchmaker is credited with pioneering innovations such as the tourbillon, developed in 1801, and the self-winding watch, introduced in 1780. (en.wikipedia.org)
Breguet’s timepieces are renowned for their hand-engraved guilloché dials and blued-steel hands, features that have attracted a distinguished clientele, including Napoleon Bonaparte and Queen Victoria. Despite its rich heritage, Breguet remains less mainstream than brands like Rolex, yet it is highly esteemed among connoisseurs. (en.wikipedia.org)