As per the title cards preceding the feature:

The state of the original negative prevented its digitization and no original copy was available. The image was therefore digitized from the best preserved copy, which was made in the 1960s. The source for the sound digitization was the duplicate positive.

The look of the digitized film is limited by the condition of the source materials and by the difference in technologies used for sound recording and reproduction at the beginning of the 1930s. Complete removal of signs of wear and tear would threaten the integrity of the film image and sound. Various features that originate from the shooting of the film or its laboratory processing have been preserved and are evidence of the technologies and creative approaches of the time.