This was one of my late step-grandfather's pocket knives. I inherited it when I was a young teen and actually carried it in my pocket everyday for the last 2-3 years of High School. This was in the late 90s early 2000s too. Not quite sure why this was allowed, nothing ever happened to me and I recall using it on campus at least a few times a year and even sharpening it in Auto Shop.
Which is why it has a slight recurve and some obvious marks on the blade. One of those things you learn as you grow up, bench grinders are for grinding not for sharpening.