As the blade was used in comparison with a Bussekin blade, it's safe to report that it's an Ontario Ranger Signature Series knife.
You got it! As can be seen, the S5 has seen some use, and due to its size, will probably see more use than most of the knives I have. It's a no brainer that the S5 is substantially lighter than the Ontario Ranger. Even my Becker BK2 feels light compared to it! Well, at least I know if I ever need to hold down a railroad tie, these knives might work!