Gosh.... I think I bought that in '73 or 4, haven't used it in years. It was just a novelty item really. I use matches when in my chair and a Zippo outside or in the truck. (I tend to hang on to things).
My slim model I first carried in high school 25 years ago. It's got one slash to the left so probably a late 70's or 1980. I only smoked the nails for about 4 years so after that it just went in a box. Pretty cool that I still have it after all the years.