Good question. I can't think of anything. Not because the Swiss are exceptional at everything but because I don't know every aspect of manufacturing attempts that have failed all over the country.

I do know one thing. I can't say it's an utter failure either because it was a niche market. Once upon a time there was a Swiss luxury vehicle called the Monteverdi. Production only lasted 17 years. It wasn't terrible or exceptional but it didn't quite survive the long term.