Be very careful in purchasing items purported to be vintage Halloween items from this seller. They have long been on my list of sellers with whom I don't do business. The sheen from the envelope is suspicious. I find it interesting there is no photo of the reverse shown and that they have not used eBay's zoom feature for this and other of their listings. If you are inclined to buy, ask lots of questions and ask for additional photos.
Mark B. Ledenbach's vintage Halloween collectibles blog.