These Beistle invitations were made only between 1918-1921. As I write on page 218 of my newly available 3rd edition, "You can tell these are early as they are mighty primitive. The printed interiors are crooked and rather sloppy. They seem to have been rushed to market. I believe that it is this poor quality that prevents these from fetching the significant dollars such early Beistle designs typically bring." There were two iterations of the same design, one with a movable part and one without. Four different designs comprise a complete set.
Mark B. Ledenbach's vintage Halloween collectibles blog.