I currently carry an old folder that had got to be over 20 yrs old. I don't know what brand it is but it has a shield similar to bulldog. The blades have been sharpened down 1/8 inch over time and both tips or no longer points. But even with all this use it still keeps a shaving sharp edge. I don't know the history of the knife it was sold to me for a penny (not given) and was pretty stiff from rust. It cleaned up very nice. I guess after all this rambling my question is this, how many here still carry an old knife after many years?