When Uhl opens The Orange Tree folder in the theatre and sees the plans for the locket for the first time, there is a hole in the center of the sheet of paper. When Uhl is in the stables and looks at the plans a second time, the hole has disappeared.
The heart shape pendant shows how it was opened, but inside there is a picture which has no creases or folds. This would be impossible with the way the item was designed as per the instructions found on the paper.
Although difficult to see, at ~0:11:31, a crease where it folded is barely visible, crossing horizontally across the eyes. Those paper instructions were "developer's notes", to be improved upon until it worked.
Although difficult to see, at ~0:11:31, a crease where it folded is barely visible, crossing horizontally across the eyes. Those paper instructions were "developer's notes", to be improved upon until it worked.
When Inspector Uhl is investigating Eisenheim's latest illusion of summoning spirits, one of his aides shows an early turn-of-the-century movie projector portraying a color/sepia-based image of a person. Turn-of-the-century film was often hand-colorized using stencil methods. Georges Méliès' fantasy shorts used that method. Several genuine color film technologies were also in use by the early 1920's.
When Eisenheim gives the coins to the street urchins, the first coin is visible in his hand before the trick.
He's tricking the street kids, not the movie viewers.
He's tricking the street kids, not the movie viewers.
Eisenheim's eye color is different as an adult than it was as a child.
Eyes can change color.
Eyes can change color.
At the train station, the green trains have large, white, bold lettering in Helvetica, a font invented in 1957.
Helvetica, the 1957 typeface font, was developed from neat, rounded hand-printed calligraphy, which existed long before 1957.
Helvetica, the 1957 typeface font, was developed from neat, rounded hand-printed calligraphy, which existed long before 1957.
As Eisenheim puts stacks of notes into his leather briefcase at the bank, a silver zipper is visible on the bag. Some early prototype of zippers did exist, but were not in common use well into the 20th century.
When police officers 'offer a drink' to Eisenheim, on the building in the background is a lightning rod of modern design.
When the crown prince slaps Sophie's face, the slapping sound is heard a fraction of a second later than the slap occurs.
Near the end, Chief Inspector Uhl is in Prince Leopold's office. When the two argue, the boom mic is visible, going from one character to the other, in the reflection on the brass table lamp.
Crown Prince Leopold would be called "His Imperial Highness", never just "His Highness".