When my co-worker retired (move to the hill country) he gave me 2 boxes of files. I'm just now going through them. I thought the were all crap. There is some crap along with a few nice ones. The cleanest is a aggressive Swiss made file marked Pluto. Can't find any info on Pluto anymore.

Never heard of Pluto but if you are looking for quality Swiss pattern files look for Grobet (pronounced grow-bay).