Out on a Limb

[Papaw]

Not sure if these are in our usual line of tools, but a friend of a friend posted these pictures looking for ID. I have no clue at all.

[oldgoaly]

some type of end mill, drill, tool attachment for a grinder?

[Bill Houghton]

No clue whatsoever.  I see more strange stuff here than about anywhere.

It'll have something to do with calibrating nutcrackers.

[leg17]

Any way to get a view of the other end of the TOP one? Does it hold something?

The MIDDLE one suggests some sort of attachment to a cutter grinder, like a guide of some sort, but don't really know.

At first look, nothing pops into mind on the BOTTOM one.

Do they look like they 'belong' to each other?
Or is this just a grouping of somewhat unrelated items?

[amecks]

First piece makes me think military, in part because of the khaki color paint on the knob.
Second piece looks like it would clamp to a work table as on a drill press, mill or lathe.
Al

[bill300d]

No.2 seems like an indicator stand or surface gauge not sure which.