One out of two stamps issued in 1984. On an ugly card :) Found by Andy from UK.
In 1984(35 countries ; 67 stamps) the CEPT was 25 years old (1959-1984). To celebrate this event it has been decided to use a common design again as it was the case before 1974. The common design was a bridge designed by the French engraver Jacky Larrivière. text is stolen from europa stamp blog