You can go to the following:
- Bucherer: They have watches from different brands, and lots of Rolex, IWC, Baume & Mercier, Chopard, Carl F. Bucherer, etc.
- Gübelin - They have Patek Philippe, Breguet, Omega, Glasshütte, Jaeger LeCoultre
The major brands Patek Philippe, IWC, Rolex and Jaeger LeCoultre also have their individual boutiques. Cartier also has its own boutique.