I'm in the process of restoring a Hammer Brand Kamp King (1945-1955 tang stamp), using the awl from another of the same vintage. Both came to me in very, very rough shape. One had both springs broken, and the other with a broken awl. Both were covered in rust. One was missing the pile side shell. I removed shells from both (one was hollow and the other was plastic backed. The black (celluloid?) was trashed on both, and easily flaked off the hollow shell knife.
I disassembled both knives. Using a red 3M wheel on a drill press, I was able to remove the rust. There was very little pitting, which surprised me. I checked dimensions on both awls, and they were the same. Out of curiosity, I measured the thickness of all pieces, and found that one of the main blades was 0.020" thicker than the other. Now, both frames being equal, and all parts measuring the same, why would one blade be that much thicker than the other?
I forgot to add that one bottle opener/screwdriver was about 1/8" longer than the other, but had no signs of it ever being ground down, so I'm assuming there was an engineering change from one knife to the next, even though both have the same tang stamp. I'll measure and compare both frames tomorrow. The frame I'm using did have a thin piece between the brass liner and spring. I'm wondering if that piece measures 0.020" to make up for the difference from the main blade to the one end opposite...
BTW...I plan on painting the handle black like it used to be, and replacing the shield from one wit the shield from the other. The knife will not look brand new when done, just very tastefully restored. I'm sure it will affect the current value, but in 20-30 years, I don't think it will matter much. I'm not altering the knife, but it will new rivets holding it all together...not that anyone would ever see the rivets on, due to the shell handles.
I didn't get before photos, but do have a few during photos. I'll post those after I'm done with this restoration.