I've seen a lot of Kenner employee owned items, and a number of quality control pieces, but very few with the formal sticker AND an accompanying sign-off card. Many QC items were just random pulls from the production or packaging process, but this was specifically pulled early in the process to approve the overall package before going into full production. The toy and package itself are production quality, but this example represents one of the very last steps before releasing the lightsabers for full-scale production.
The package colors do have some light fading and there is some box wear, but overall an attractive piece to highlight in a collection.
This example was purchased directly from a former Kenner employee who worked on managing the production process of the Droids toy line among others. First time on the open market!