Interesting pieces. I would think that translating the writings on the sheets, and the writings on the cancels will shed some light on their origin. I doubt that Iranian Post authorities would know anything about them. They look very crude, my guess would be that they are some sort of souvenir pieces from 1920s -1930s, but this is just my uneducated guess.
You need any help with Persia, I am here.. 1. Keep posting them pic's. Love em. 2. See my articles on stamporama for early Persia/IRAN.. 3. See my store for certified examples of early Iran. 4. Bluecollarwrench on hipstamp. Good info there to learn from. 5. I have many articles on/in the IPDASTAMPS newsletters to learn from. 6. Always here to help anyone with Persian stamps. 7. Check out delcampe, stamps for good info also. Welcome and good luck! Lee