The goal of digital restoration was to make the available in a form similar to how it could have been seen and heard by an audience at the time when it was first released in 1969. As a result, various features that originate from a shooting of the film or its laboratory processing have been preserved and are evidence of the technologies and creative approaches of the time.
The source of the digitization were film materials stored in Národní filmový archiv, Prague. The image was digitized from the original negative and the sound from duplicate positives.
The restoration was done by the Hungarian Filmlab in Budapest, under the supervision of Národní filmový archiv, Prague, in 2015.
Supported by grant from Iceland, Liechtenstein and Norway and co-financed the Ministry of Culture of the Czech Republic. Project partners were the National Library of Norway and CESNET.