One variation of the Wenger Canyon Swiss Army knife was produced without a key ring. It makes for a slightly lighter and more elegant pocket knife, if you don't plan to attach your pocket knife to anything else.

Canyon-- adds key ring
Canyon Economy-- adds key ring, no toothpick or tweezers
Canyon Locking Blade-- locking large blade, adds key ring

Trailblazer-- nail file instead of small blade (retired model)
Viking--corkscrew instead of phillips screwdriver

Tinker-- identical features in a slightly larger knife (3 1/2" / 91mm)
Tinker Small-- identical features