Millers Falls mic

[supersteve]

Gentlemen,
What can you tell me about the item in the pictures below?
A fellow at work walked up to me yesterday and handed it to me.
I think he may want to sell it to me, so I figured I'd run it past you guys first.

 

[bobadame]

They don't get used much. If you have room in your machinist box go for it but I wouldn't pay very much for it especially if you don't have a way to check the calibration of each of the rods.