Body Dolly?

[toomanytoyzz]

My father-in-law picked this up at a flee market today. Anyone ever see one like this before? Looks like a hammer head minus the hole for the handle. It should work well when you can't get the handle in a tight area, but still need to hammer a dent outwards.

 

[3baygarage]

Sounds like you're on the right track.

 

[wornoutoldman]

Aviation bucking bar used when riviting in tight spaces.