Can anyone tell me what this is?

Looks like most of or at least part of an Ideal-style loading tool.

Lyman still makes something similar but with changeable dies: http://www.lymanproducts.com/lyman/dies/lyman-310-tool.php

When you open up the handles, what's under the metal plate near the joint? I am guessing there is a bullet mold under there.

Added after posting: Googling on "45-60 Winchester loading tools" turns up images on very similar looking tools. I am guessing that yours might even be a Winchester tool and not an Ideal or Lyman.
 
Now I can


45-60-XL.jpg
 
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