The oldest EDC that I have is a Waterville "easy opener" barehead two-blade jack with ebony handles that dates to well before the turn of the last century. The knife belonged to one of my maternal great grandfathers. My next oldest is a Progressive Era two-blade "teamster pattern" bone-handled tear drop jack, which was made by Fox of Milwukee, Wisconsin, that belonged to the other of my other maternal great grandfathers. Both knives are "users", having been repaired back to usability. (Yeah, I know, "collectors value", and all that, but these knives were tools and that is what they will remain for as long as I am around to use them. And what tools they are! I don't know what they put in the old "silver steel" that is used in these knives but it seems to cut a whole lot better than most modern steel blades that I have used do.) These old knives are a pleasure to use and are fond reminders of the grandfather and great uncle who passed them on to me.