buying Rolex in switzerland

If you are going with a Hong Kong tour, then the tour guide will certainly bring you to the big watch shops in either Zurich, Luzern or Geneva.
If your tour will visit Leichtanstein, then you can also buy the watch there. Since this country is duty free, so their Rolex is cheapest. However you may not find the style you like in this country.
Among all the shops in Switzerland, the one in Luzern is the cheapest (not too much). Other cities are having more or less the same price.

在瑞士有沒有Panerai and Patek Philippe買，有幾多Discount?