So, I have a bunch of these. You can put a stamp on the outside and send it as it is and when the receiver gets it they open it up and there are multiple photos of said location. Have you ever sent these to a post crosser? I wish I could detach each one and use as a postcard but unfortunately they are double sided photos.
These are vintage. I have about 6 or so. What’s your thoughts? Should I send them?
They sound like aerogrammes. Its definitely a part of philately. There are philatelists and collectors of such ephemera in the world. Check the Aerogramme tag or offer them in a post in the other items category.
Maybe… but different people have different ideas of “vintage”. You might have the happiest outcome if you offer it as a Lottery prize in the Games section.