Ok the two best vintage stores in zurich:
Lux plus:
http://www.luxplus.ch/ . little shop with really nice staff. Loads of shoes and jackets & coats & leather stuff. You can even find a designer piece if you're lucky.
Second one is the 16 tons,
http://16tons.ch/ loads of records but also shirts, dresses, bags shoes, for men & women. and also the occasional NME issue from the 70ies. it is really set in that 60's / 70's mood so you know what to expect.
Other than that I can really reccomand the flea market at the helvetiaplatz every saturday, if you look around you really find you thing. Or the market at the Bürkliplatz that mostly takes place in summer every Saturday until 4 pm.
That's it.
Cheers guys.