I have to agree regarding specimen 11, it does not look right for the currently known F90 reverse, though I’m not sure what it is.
And if you are talking about the F90 from Australia, it is now conserved and in my cabinet, at last one I can live with. I will post updated photos shortly.
And I don’t think the price of the 1847 Medusa is that unreasonable either, a bit over £3k after currency conversion and import vat to the UK, I suspect if slabbed and the variety better known in the US market it would have gone higher. There were at least three bidders involved above £2.5k.
Jerry