20 years to Warsaw Treaty, USSR stamp, 1975, 6 k.
The original uploader was <a href="https://en.wikipedia.org/wiki/ru:User:Wassily" class="extiw" title="w:ru:User:Wassily">Wassily</a> at <a href="https://en.wikipedia.org/wiki/ru:" class="extiw" title="w:ru:">Russian Wikipedia</a>.
15 March 2006 (original upload date)
New: Scanned 600 dpi by User Matsievsky from personal collection. Old: Originally from <a class="external text" href="https://ru.wikipedia.org">ru.wikipedia</a>; description page is/was <a class="external text" href="https://ru.wikipedia.org/w/index.php?title=Image%3AWarsaw.jpg">here</a>.