I have a feeling that gold stamp image was lifted from the Gibbons
encyclopedia of stamps.
I am unaware at this time as to the reason it was minted.
Possibly a gift to royalty?
May I add, in all examples I have seen of gold or silver
on stamps, genuine or otherwise, I feel it doesn't work.
Often it is used for value ID, and is oft the case
it is barely legible and gets lost in the background.
Most times it is used for "gimmick" quotient.
Of course there are exceptions.
A gimmick bogus label from the Isle of Pabay
Gold foil (complete with fingerprints of viewers over the years)
(note: gold does not scan well)
