George IV 1/2 Farthing 1830

Oh, and yes, I know there is another guy on the reverse side haha... it's a ghost

I guess I would too, I was thinking a VF+ because of the lustre though.
I don't know if it was polished, but it does look 'brassy' and Sap is saying it's polished.

I've heard about electroplating in the context of making forgeries, is this one?

I don't know much yet but does lacquering make any sense?

If so, am I to understand it was intended to preserve the die clash?

Ah, plated or painted. I didn't think of that.

I have a new scenario for you: that sometime shortly after this coin was released for circulation, it was plated or gilded by some means, to appear golden, and thus perhaps pass it off as a half-sovereign - the lack of denomination and rapid-fire changing of monarchs and coin designs in the early 1800's might have made it easier to pull off such a scam.

If so, then it's a pity - the coin looks very high grade beneath the plating, or lacquer, or whatever it is. EF plus. Still, if my hunch about gilding is correct, then it's this very discolouration that's preserved it - it's ended up in someone's "bits and bobs box" where it stayed, out of circulation and unworn, for a very long time.