I don't know why they were ever made illegal in some areas in the first place. Especially since there were switchblades in common use for one hundred years in the US before the 50's liberal white women became scared of Hollywood's propaganda portrayed in movies of the time.
Yeah, somewhere around here I have a switchblade my grandma took from my dad back in the 40’s when he was little, he bought it at the grocery store, it’s an uncle Henry I think