In many scenes, a vintage UHER report reel to reel audio recorder is visible, recording the sound on set. The model and microphone changes between scenes, and throughout the film, every generation of UHER report audio recorders is represented by a specimen and shown in operation; from the first model "4000 Report" from 1961 to the last "Report Monitor" generation from the 1980s.
Ordered by year of manufacture, these types of UHER report reel to reel audio recorders appear in the film:
1961: 4000 Report (first variant, grey buttons): On the railroad tracks.
1962: 4000 Report (second variant, yellow buttons): While discussing the name "vanderkurth".
1963: 4000 Report-S: In the workshop while doing woodwork.
1965 - 1971: 4000 Report-L: Carried by the journalist in the final scene.
1965 - 1971: 4200 Report: During a conversation between the director and the protagonist.
1972-1979s: 4400 Report IC: While vanderkurth plays electric ukulele.
1979-1990s: 4200 Report Monitor: While interviewing Bernd Heidelbauer.
In addition, a 1964 UHER universal 5000 recorder is visible while vanderkurth explains the number of works he created.