Hungary
Universal Postal Union Centenary Issue
Cover of Universal Postal Union Centenary Commemorative Booklet.
On May 22, 1974 Hungary issued a set of six regular values, one airmail value and a souvenir sheet with four airmail stamps to commemorate the centenary of the Universal Postal Union.
Stamps commemorating the Universal Postal Union Centenary with first day of issue cancellations.
Stamps commemorating the Universal Postal Union Centenary with first day of issue cancellations.