At the time of this photo the service from Bergisel to Mühlauer Brücke (the terminus being named Hungerburgbahn until that railway was re-opened with a new city terminus in 2007) ran along Anich Straße and Maria-Theresien-Straße.
73 is one of the Düwag trams new to Innsbruck and is on Maria-Theresien-Straße. Once the hub of the tram system, this section now sees no trams at all.