What do I have here?

[Janderso]

Grinding wheel radius dresser with a super charger?
It seems to be in good shape.
I got it cheap. Almost free.

 

[JimDawson]

Grinding wheel radius dresser with a super charger?

That looks like exactly what it is.

 

[Bob Korves]

It is a dresser for doing both radii and angles. Useful for your surface grinder. Great score!

 

[mmcmdl]

Bob nailed it . Angle and radii wheel dresser . Nice tool if you're doing form grinding .

 

[Janderso]

Started tinkering with it last night. There is a looseness in the shaft. I'll need to identify it's source and deal with it.
I watched two videos on this subject, Don Bailey and Stan, The Bash man.
Very interesting.
I found this on Google Images.
It's a DoAll. I'm pretty happy about that.