That's an interesting old knife! There are several things I don't understand about it, too!
What is the device on the shackle end that looks like a doubled bitted ax ?
The holes in the handle, one side being square, would hold the head of a small carriage bolt but for what reason. And then there is the hole in the small spear point blade?
One would think the top latch/lever would be to lock one or more of the blades, either open or closed.
Can you provide another picture looking directly at the back knife, the side the hoof pick, gouge and corkscrew are sprouting from?
Hopefully some one will come along and know all about your find.
I see Ridgegrass has cleared up the ax lookin' device, a shell puller.