Hammered coin?

[georgie 1]

 i baught this coin for a £25 at a boot sell, wasnt actually sold as a coin but a collection of scrap silver coming to 76 gramms, this coin was amongst it, i know next to nothing about hammered coins although a little about modern milled, the kings head seems to be missing (worn). how old is it (if in fact its a coin at all)

[bagerap 706]

Others will know better than I but the general symmetrical roundness of the coin and its interior circle make me think that it could be a modern restrike.

[georgie 1]

yeah, i tend to agree, ive been looking at pictures, although this one is battered, its to round and uniform.

[Rob 3,002]

http://www.cngcoins.com/Coin.aspx?CoinID=328817

This is what the genuine article looks like.