Gonk or Humpty Dumpty?

My mum picked this up from a bootfair a few weeks ago. She thinks it is something called a 'gonk', that she use to play with when she was younger.  I think it looks like Humpty Dumpty.

Anyway whatever he is, I think he is pretty cool and I want to keep him. I just need to work out what I am going to do with him..... xx