USSR stamp, Abū Rayhān al-Bīrūnī, 6 copecks, 1973.
The original uploader was <a href="https://en.wikipedia.org/wiki/sl:User:Romanm" class="extiw" title="w:sl:User:Romanm">Romanm</a> at <a href="https://en.wikipedia.org/wiki/sl:" class="extiw" title="w:sl:">Slovenian Wikipedia</a>.
3 April 2005 (original upload date)
Originally from <a class="external text" href="https://sl.wikipedia.org">sl.wikipedia</a>; description page is/was <a class="external text" href="https://sl.wikipedia.org/w/index.php?title=Image%3ABiruni-russian.jpg">here</a>.