Ernst Theodorowitsch Krenkel, 70th anniversary, stamp of the Soviet Union, 1973, 4 kopecks, postage stamp block
The original uploader was <a href="https://en.wikipedia.org/wiki/ru:User:%D0%A1%D0%B4%D0%BE%D0%B1%D0%BD%D0%B8%D0%BA%D0%BE%D0%B2_%D0%90%D0%BD%D0%B4%D1%80%D0%B5%D0%B9" class="extiw" title="w:ru:User:Сдобников Андрей">Сдобников Андрей</a> at <a href="https://en.wikipedia.org/wiki/ru:" class="extiw" title="w:ru:">Russian Wikipedia</a>.
5 August 2007 (original upload date)
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%3AKrenkel_stamp_SSSR.jpg">here</a>.