George II Halfpenny or Farthing?

[StGeorge 0]

I have acquired this coin but am not sure if it is a farthing or halfpenny. It is 24mm in diameter and weighs 4.4g, can anyone help?

Here is the reverse.

[StGeorge 0]

...and the obverse.

[Rob 3,242]

Farthing

[StGeorge 0]

Thanks Rob

[Peckris 579]

Further information :

That date was minted for several years, up until the next official issue which was not for another 20 years. So there's rather a lot of them (same with the 1758 shilling which was minted on and on and on too). It's not worth a great deal for this reason, you'd need one in the top two grades to have any significant value.