Puller or????????

[toolmiser]

No marking, but it doesn't look hand made.  Not thin enough to be a bearing separator. 
Could it be some sort of die wrench or used on a metal lathe?  Thanks for the info.

[rusty]

>used on a metal lathe?

Yes, lathe dog.

Picture for a thousand words...:

http://books.google.com/books?id=nCcDAAAAMBAJ&pg=PA192&dq=clamp+on+lathe+dog&hl=en&sa=X&ei=RgBOUcGFN8PXyAHN7oCgAQ&ved=0CEIQ6AEwAQ#v=onepage&q=clamp%20on%20lathe%20dog&f=false

[toolmiser]

That makes good sense.  My metalworking needs more education!

Thanks again!