These 3 patches are stuck to the piece of poster board shown & are used (most probably at one of the actual semi-finalist NWC 1990 events). The middle GUEST pass has a piece of something (possibly paper) stuck to the bottom part of the back. You can see marking 'x' on the Semi-Finalist patch from the event and a "7 pm" / "38" (Contestant or Group 38?) Sticker on top the patch that the contestant would have received.