- Perlberg-Seaton Productions
- (the Perlsea Company)
- Paramount Pictures
- (United States, 1962)(A Paramount Release, theatrical)
- Film AB Paramount
- (Sweden, 1962)(theatrical)
- Paramount British Pictures
- (United Kingdom, 1962)(theatrical)
- Paramount Films of India
- (India, 1962)(theatrical)
- Paramount Films
- (Netherlands, 1963)(theatrical)
- Laboratoires Franay Tirages Cinematographiques (LTC)
- (L.T.C. Laboratories, Saint-Cloud, France, negative processing)
- Technicolor
- (prints)
- The City Government of Copenhagen
- (we wish to express our gratitude to: whose cooperation made it possible to photograph the authentic locales in the re-creation of this true story)
- The City Government of Hamburg
- (we wish to express our gratitude to: whose cooperation made it possible to photograph the authentic locales in the re-creation of this true story)
- The City Government of Stockholm
- (we wish to express our gratitude to: whose cooperation made it possible to photograph the authentic locales in the re-creation of this true story)
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