<a href="https://en.wikipedia.org/wiki/en:Alexander_Stepanovich_Popov" class="extiw" title="w:en:Alexander Stepanovich Popov">Alexander Stepanovich Popov</a>
Unknown author<span style="display: none;">Unknown author</span>
This photoimage was taken before 1906, because Popov died in January 13/December 31 1905/6
scan of old photograph