I wonder, is there a way to date a knife even a little more specifically in the ranges given? I have a kamp king jr, 3 blade, and the tang stamp is the 1956-1988 version. I know this knife is more than 30 years old, but is there any tell tale factors that can place it atleast in a specific decade? Design changes, other stamps, etc. It drives me crazy to have a 32 year range, I am a stickler for dating and researching ALL my knives as thoroughly as possible...even the cheapos lol. Any further info is appreciated!