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Premiere edit
According to L'Almanacco the premiere was on 15 July, and has different singers: "soprano Johanna Klemperer (Helene), tenori Erik Wirl (Robert) e Georg Ripperger (Krankenwärter), baritoni Gerhard Pechner (Professor) e Karl Giebel (weiser Vorübergehender), mima Betty Mergler (Emma), recitante Martha Lothar (Dienstmädchen)}, dirige Ernst Mehlich." -- Gerda Arendt (talk) 14:45, 7 March 2023 (UTC)