Initially I thought this breaker may have suffered heat damage from a loose connection, but it's clearly been much more serious than that.

This breaker was sent in a box of stuff from Thomas Nagy. His channel is here:-
   / @thomasnagy  

There are quite a few other interesting items in the box that I'll cover in future videos.

If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.