I bought this tool at a flea market because I liked its vintage look.  However, I cannot find any information about it online.  The marking on the tool reads " Guillet Overhauling System Precision Alignment."  There is no patent number or other identifying info on the tool.  I'm assuming that it was used for auto work or machining.  I would like to find out what it was specifically used for and to date it.  Any assistance/info would be appreciated!

This is a long shot, but , there was a fellow at Penn state, Professor of mechanical engineering, wrote a book 'Kinematics of machines', around 1940-1950's, named George Leroy Guillet.....

Some kind of calibration/alignment tool....(?)

Connected to DIXIE SPINDLE & FLYER COMPANY, INC. , but I didn't find much other than trademark info.

Can you get a shot of the bottom?

It is a double hand to eye co-ordination tester  or a nut cracker  bob w.

Using this http://www.trademarkia.com/guillet-overhauling-system-71572027.html

I found this http://www.google.com/patents?id=S2BaAAAAEBAJ&pg=PA2&dq=guillet+alignment+textile&hl=en&sa=X&ei=W-5dT4i3DoLF0AGyrcDSDw&ved=0CDQQ6AEwAA#v=onepage&q=guillet%20alignment%20textile&f=false

I believe this is part of a later system from this inventor, used in the textile industry to adjust roll stand bearings.

Just a WAG, based on what I found.

(PS: Are you the same knuckleduster from over in Maryland? I think I sold you a pair a while back!!)

Thanks to all for the speedy replies!  Papaw and keykeeper shed some light on its origins.  Keykeeper, must have been a different knuckleduster you dealt with regarding the sale.  Thanks again for digging up the info!   

Keykeeper, that is Knucklebuster on Garage Gazette you're thinking of, I bet.

Naw, I sold a fella a set of antique Civil War era iron knucks a while back. Knuckleduster was his handle on a chat board I found him on.

Just thought it may be the same fella.