Pakistan issued a set of three stamps on 7th December 1955, On the occasion of Unification of West Pakistan. Pakistani map is printed on these stamps. There is also printed Pakistani flag on the right and left side at the top. as shown in the above picture.
On 9th July 1948 at the time of celebration of 1stIndependence Day, the Pakistan introduced four postal stamps. This set is also known as Chughtai Art. There is Pakistani flag printed on only two stamps out of four.