I do not have information on which contestant they originally belonged to. There are 2 Authentic VIP GUEST patches and 1 Authentic VIP SEMI-FINALIST patch. All 3 patches are stuck to the piece of poster board shown in the photos. They appear to be used by an actual semi-finalist at one of the NWC 1990 events. The middle GUEST patch has a piece of something (possibly paper) stuck to the bottom part of the back.
It looks like it could have came in contact with paper after being peeled off of the Guest's shirt. You can see a green'x' marking on the. Grey sticker on top-right of the patch.The contestant would have received this sticker on their patch (as well as the patch itself) at the actual event. These patches are made of some type of thin fabric and are sticky on the back. They are all stuck to the piece of white poster board just as I received them 10-15 years ago.
I have not tried to peel them off and will not try to do so. The panel of patches is stored inside a clear plastic sleeve as shown in the final picture. The item "3 RARE Authentic Nintendo World Championships 1990 VIP Patches from NWC Event" is in sale since Monday, February 24, 2020. This item is in the category "Video Games & Consoles\Video Games". The seller is "justgovintage" and is located in Kansas City, Missouri.
This item can be shipped to United States, Canada.