Tristan Da Cunha 1/2 Sovereign [solved]

Hi all

I'm not a coin guy, but I bought this coin for a friend and I can't find it in the catalog:

I was thinking, if it isn't in the catalog I might as well add it. The closest to this coin I can find is the £5 silver version:

5 Pounds - Charles III (Coronation; silver plated) - Tristan da Cunha – Numista

So my question is:

Is it in the catalog?

And also, are my scans above good enough? I also have an edge photo:

I don't know anything about the coin, and I have passed it back to its new owner (he has given me permission to share photos of it)

Not in catalog yet. Just click the Duplicate this page link at the bottom and change the differences (composition, weight, etc.). Pictures are fine.  Is it plated or all gold? Purity? You can always add/change afterwards.

It is 22ct solid gold, weighing 3.99g according to the shop advertisement.

I'll see if I can add it, thanks.

Included

Thanks. It's a strange one, I can't find it anywhere online, only the original ad.