We know now that Beistle did not produce these paper-litho horns. In fact, there is no record that Beistle authorized the use of the their imagery in the production of these horns. If you examine the horn's artwork and compare it to the items with a fairy motif that Beistle actually produced, there are enough stylistic differences to lead to a conclusion that these types of horns were produced with no license from Beistle. The leading culprit in producing unlicensed items at that time was Japan, so I believe these horns were made there.
Mark B. Ledenbach's vintage Halloween collectibles blog.