Guy Bleus (aka 42.292), 1984, Aerogrammes - Poster of the Mail Art exhibition (with aerogrammes) in the Municipal Museum 'Het Toreke', Tienen, Belgium, Oct. 19 – Nov. 18, 1984
<a href="//commons.wikimedia.org/w/index.php?title=User:TAC_42.292&amp;action=edit&amp;redlink=1" class="new" title="User:TAC 42.292 (page does not exist)">TAC 42.292</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>