Here's a rough diagram of the construction technique. A guard with a rectangular hole is slid down over the tang and then X leather disks are slid down and heavily compressed. The pommel, with a pommel pin hole drilled through it is placed over the what I call the "pommel pin tang" and a pin is inserted thought the pommel and pommel pin hole.
The differences between the WW2 versions (Kabar, Camillus, PAL, R-S) and the modern Kabar version
- 1) The WW2 pinned versions had pommels 1/4" thick. The current Kabar pommels are 3/8" thick.
- 2) The WW2 pommel pins went all the way through the pommel and is visible from both sides. The modern Kabar pin is blind pinned, going only about 3/4 of the way through. All others have 1/4" thick pommels.
The official post-Korean War versions, Utica, Connetta, Camillus, Ontario (current contract as well) , and the post-contract-ending Camillus knives were all through-pinned.
On a last note, although I have the corners depicted as square, the inside corners actually have a 1/32" radius in them.