The top photos feature the Post office in Yazd. The Post offices here sell Definitive stamps only which currently feature the Persian alphabet. When I got to Shiraz I was able to find a philatelic office with difficulty. I was ushered in upstairs who were very friendly and happy to assist me with finding interesting stamps of Iran for use on the postcards. Iran and Kenya are simular in that they impose a tax of 18% on stamps, so you dont pay the face value. The make matters more complicated in Iran they talk in "Toumans" which is 10 to the value of the local Rial . So when checking you need to confirm what the Currency they are using. There is very little credit card international credit card usage here, so loads of cash required.