@mys, first welcome to CCF. Second, as noted by @jim, this was done after the coin left the mint. It is a neat find, but doesn't add to the value. Here is a link to a previous thread showing the card on which some of these were mounted:
http://goccf.com/t/89982
http://goccf.com/t/89982
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz






















