The non-serrated, one hand opening trekker - in either black or camo. It's one of the larger, 4 & 3/8 inch, SAK's. Beside the locking blade, the large screwdriver also locks, and it has the excellent saw (no scissors though). I see on amazon it's $43, which is ten more then I paid for it on amazon over a year ago. I suspect you won't get it much cheaper in Switzerland. I also have the serrated version in black, if you don't mind serrations on the front end of the blade. It's cheaper - $36. Works fine.

http://www.amazon.com/Victorinox-Swiss-54874-Trekker-1-Handed-Opening/dp/B00GVKV6VU/ref=pd_sim_468_1?ie=UTF8&dpID=4173B6GACVL&dpSrc=sims&preST=_AC_UL160_SR140%2C160_&refRID=131412SK6GV17RGR6NAN