<b><a href="https://en.wikipedia.org/wiki/Clemens_Krauss" class="extiw" title="en:Clemens Krauss">Clemens Krauss</a></b> (1893–1954), autograph of the conductor.
Clemens Krauss
Collection <a href="//commons.wikimedia.org/wiki/User:Walter_Anton" title="User:Walter Anton">Walter Anton</a>