Why this exists
Three companies own most of the watch brands you've heard of.
Swatch Group owns Omega, Breguet, Blancpain, Longines, Tissot, Hamilton, Harry Winston, Glashütte Original, and the movement supplier ETA.
Richemont owns Cartier, Vacheron Constantin, A. Lange & Söhne, Jaeger-LeCoultre, IWC, Panerai, and Piaget.
LVMH owns TAG Heuer, Hublot, Zenith, Bulgari, Tiffany & Co., and Chaumet.
In 1975, Zenith's owners ordered the destruction of all tooling for the El Primero, the first automatic chronograph. Quartz was the future. A foreman named Charles Vermot hid the equipment in an attic instead.
Ten years later, when mechanical watches came back, Zenith resumed production using those hidden tools.
The brands on this site decide for themselves what gets made.