...what this is?

http://cgi.ebay.co.uk/vintage-blacksmith-tinsmith-jewellers-ANVIL-tool-/250723495985?pt=UK_Hand_Tools_Equipment&hash=item3a6048f031

Looks like a tin knockers tool, or sheet metal tool.

Ya but it looks like they completely mushroomed and deformed the one end.
Weird looking tool though - can't tell where it would mount to a bench or anvil.
The section that looks like a foot does have a slight flange around it but it doesn't look like enough to keep it stable if you're pounding on it.
Truth be told .. I got nuthin'

Anyone else?

maybe some one used it as a hammer when it would fit into a bench holder of some sort on the short mushroomed end. the longer end who know what it was suppose to look like

Looks sort of like a body dolly to me but I don't know, I've never seen it's like.

Frosty the Lucky.

I like the way that 'not 100% certain' can mean 'not a clue!

To me it's patently clear that what you see before you is a thingimabob number 5, I'm surprized at your obvious 'lack of knowledge and/or apreciaton'
In my army days the instructors would have responded "Dumb Question Sit!" so it's possibly a DQS5?

My goodness Sam, where do you find these things? Please do'nt stop looking--I find this sort of tool facinating, in truth it looks like it might be some sort of shoemakers tool that has been abused at some point?
Ian

I like the way that 'not 100% certain' can mean 'not a clue!

Or that even though they don't have a clue what it is, they sure do know that it's VERY RARE!

If you carry it across the shop and put it to work then it`s "exactly the right tool for the job".
If you throw it back in the drawer/box/bucket/truck then it`s more useless junk.
With the properly applied modification techniques I find most anything from the second category can be magically transformed into something from the first. :)

I think it's the legendary wimwam from a mustard mill.