First pic makes me think of some sort of lapidary work.
But I tend to think of that as being mostly wet work and the base of this thing doesn't really look like it's intended for wet stuff.
The ball mount base.
The round flange is key to what it carried. That scrape mark on the side (above the clamping lever) leaves more questions about its usage, (or storage conditions? )
Third pic.
Thinking that item goes in the same shop as the first photo.
Looks like rotary tool on a base vs freehand. With a shroud to hook collection/vac hose to.
Any chance that it was mounted on the ball base unit?
The saw tooth setting tool.
The one I have has straight handles rather than the 90 deg setup this one has.
Mines a bit crustier looking, as it was a salvage job find.
I've used mine to set the teeth on brush cutting blades for my trimmer.
The blades i've used were always the ones resembling a plywood blade.
The slotted control piece.
The pivot point looks to be offset to left (in photo) Hand Knob wouldn't hold well in the right side of travel unless you really twist it to point of indenting the slot edges.