Stamp of the USSR, Avetik Isahakyan, 1975, 4 k.
Scanned and processed by <a href="//commons.wikimedia.org/wiki/User:%D0%A1%D0%B4%D0%BE%D0%B1%D0%BD%D0%B8%D0%BA%D0%BE%D0%B2_%D0%90." title="User:Сдобников А.">A. Sdobnikov</a>
30 May 2008 (original upload date)
New: Scanned 600 dpi by User Matsievsky from personal collection. Old: Personal collection, <a rel="nofollow" class="external autonumber" href="http://cosh.com.ua/index.php?qi=11715">[1]</a>