I just got back from Zürich (which is now my favorite city) and I went into a few stores selling SAKs & Multi-tools (including Leatherman), but I didn't see any one hand opening knives (or multi-tools with one hand opening blades), fixed blades, or regular pocket knives. I can't say what this means about what's legal there, but most other stores I've seen with knives have more selection than that. I didn't have occasion to get searched, so I can't even say whether my knives were legal there. (In contrast, I saw a lot of one hand opening folding knives and fixed blades, and some balisongs in Barcelona, and saw all that in addition to autos, nunchukas, and spiked brass knuckles in Paris)