Iran and Pakistan have long friendly ties since independence of Pakistan in 1947. Iran was the first country to recognize the independent status of Pakistan upon its independence from the British India in 1947. The then Shah of Iran, Reza Shah Pehalvi, was among the first few heads of the states to have visited Pakistan.
These friendly gestures were also reciprocated by the Pakistan presidents. Sikander Mirza, who ws the president of Pakistan in 1956 paid an official visit to Iran in 1956. The Iran Post issued a commemorative stamp (left) priced at 1 Riyal. In 1959, when President Muhammad Ayub Khan visited Iran, a commemorative stamp of 6 Riyal was issued (right).
Both stamps are from my stamp album.