Kelly Firebaugh

Thought it might pair with a vise or mount to a truck/tractor bumper.  Just never seen one separated like this.  Any ideas on brand?  Might be able to find the partner.

Was at an auction recently and came across an anvil I'd never seen before. Couldn't find any markings, but house a large round base, weighs about 15 pounds, has a 1/2 in hardy hole, its hollow, and the back has a huge hole that looks like a mounting setup.  Any ideas?  I don't normally buy stuff like this buy it intrigued me and I got it for a mere 15 bucks.  Figured I can use it as a portable.