I have a 1985 Gerber clip lock survival knike. It is brand new in the box. the markings on the end of the box read 5305 serrated dbl.edge. The blade markings are 97223. The box also has a sticker reading Clip-Lock Blade Magazine 1985 Knife of the year. I was curious as to the value of a knife like this. Any information would be helpful, Thanks