Thanks everyone for your kind comments. I am indeed VERY fortunate!
I can't make a comparison to a Mark King, simply because I've never played one. Valentino is probably in the best position to comment on that.
The inlay is bare as best as I can tell. If I run a finger over it, it is completely smooth. If it is coated - it's a very thin coating! I suspect that there is no coating.
Cheers,
Rog