I have been going through my grand dads tools and wood working things. I came across two pocket knives. One being the john primble. I dont know much about them. But can make out the markings. I would love to know when they were made. My grand dad was a cabnet maker for Thomasville furniture for 55years. These knives have seen ALOT of work. The blades are really worn... and razor sharp. They have been in a wooden chest in my dads basement. He has recently passed... thus being the reason i have the knives. Any info would be awesome.