Questions about a 184

[midline]

Hello,
I have owned several 184s over time but bought one about a year ago that is different. Wondering if anyone might be able to help me out with it.

Anyway, the knife is a pre -patent pending version in dull dark finish with a pommel compass. Differences are the guard/hilt where the pins attach look to be ground uniformily on each side and the blade looks to have a little different dimensions (the space from the front and back of the forward small saw teeth) than others. Normally I would think someone just ground it themselves, but it is super accurate, symetrical and had to be done before adding the battleship grey finish. The sheath also has a longer web loop than the others i have owned.

In the 2nd pic, the bottom knife is the one I am asking about. In the 3rd pic, it is the top one. Nice planning, eh.

Its matching case is on the right in the last picture.

Any ideas would be appreciated.
-Richard