The building of the former post-office "1170 Berlin-Köpenick" (before "117 Berlin"). The little tower on the roof was the former "Telegraphenverteilerstation" which is also depicted on the stamp Michel No. 3333 from 1990. This photo was made against the sun.
<a href="//commons.wikimedia.org/wiki/User:Katharinaiv" title="User:Katharinaiv">Katharinaiv</a>
<span class="int-own-work" lang="en">Own work</span>