Schneebergbahn 999.101 in Puchberg station. This engine was the only class 999.1 on this line and originally built for the Schafbergbahn.
<a href="https://de.wikipedia.org/wiki/Benutzer:Herbert_Ortner" class="extiw" title="de:Benutzer:Herbert Ortner">Herbert Ortner</a>, Vienna, Austria
CC BY 2.5
own picture, scan from film