"Guten Morgen" ("Good Morning") from the operetta "Der Kellermeister" ("The Cellar Master") "Guten Morgen" ("Good Morning") from the operetta "Der Kellermeister" ("The Cellar Master") Main opus "Der Kellermeister" ("The Cellar Master"), unfinished operetta in 3 acts (completed by Johann Brandl and Rudolf Raimann)