Jacket states that the laserdisc is presented in the windowbox format to preserve the entire 35 mm image. Both features are windowboxed.
The Human Monster transfer is from a British 35mm nitrate negative owned by Blair and Associates. Both the British and US titles were restored to the 76 minute British version - The Dark Eyes of London. The sound was digitally processed from the 16mm magnetic tracks.
Chamber of Horrors transfer was also a British 35mm nitrate negative owned by Blair and Associates, except for reel six (6) which had noticeable signs of nitrate decomposition. A 35mm fine grain was used to replace the lost segments. Both the US and British title sequences were found and restored to the 86 minute uncut British negative - The Door With Seven Locks. The sound was digitally processed from 16mm magnetic tracks.