Commemorative stamp for the Bach festivity in Leipzig jun, 6th till jun, 26th 1935
<a href="https://de.wikipedia.org/wiki/Ferdinand_Spiegel" class="extiw" title="de:Ferdinand Spiegel">Ferdinand Spiegel</a>
scanned by <a href="//commons.wikimedia.org/wiki/User:NobbiP" title="User:NobbiP">NobbiP</a>