Issued by the Netherlands in 1971, this whimsical 55-cent stamp celebrates the theme of communication through letters. Designed by Wim Crouwel and Ootje Oxenaar, it features a playful illustration of people reading, writing, and exchanging envelopes, arranged around a square central frame. The figures’ dynamic poses and bright, modernist style reflect the Dutch graphic design aesthetic of the era. The empty perforated center cleverly represents the open space of a letter or a stamp frame—symbolizing the exchange of messages and creativity in correspondence.