The 4K digital
restoration was made possible by Czech National Film Archives in
cooperation with Film Servis Karlovy Vary. The technical work was
done at L’Immagine Ritrovata in Bologna, Italy. Archives that
participated in the process included British Film Institute,
Cinémathèque16, Cinémathèque suisse, France’s Centre national
du cinéma et de l’image animée, the Danish Film Institute,
Filmarchiv Austria, Gaumont and the Slovak Film Institute.