orologio en CB01 OFFICIAL. The film is an adaptation of the 1891 operetta Der Vogelhändler by composer Carl Zeller, with libretto by Moritz West and Ludwig Held, though it incorporates few of the original songs, using them mostly instrumentally or in the background. The plot follows Adam, a Tyrolean bird seller in 18th-century Rhineland, who hopes to marry his beloved Christl, a postmaster's daughter; to secure his future, she arranges for him to perform at court, but complications arise when she is mistakenly suspected of an affair with a philandering prince.