Really?
That's not all that bad, a couple days in your pocket and you might get something that looks like that. If you're really bothered by it I'm sure you could get it out with sandpaper and repolishing the brass, or Buck could probably buff that out too, but if that's the only one I wouldn't worry about it that much. I can't get a good picture of the scratches on mine because my camera's a cheap piece of junk but I have a couple in mine that look like that, one scratch goes straight from the end of the bolster, right across the handle scale.