Factual error: In the beginning, when the Germans are setting up the tables to record the names, one German puts down a plastic stamp pad. Stamp pads of that era were metal.
Suggested correction: Not true. Rubber stamp pads were invented in 1866. By WW2 they were easily available.
I do not believe the mistake refers to the stamp itself or the ink pad, but to the container holding the ink pad. The stamp is made of rubber, but the ink pad should be contained in metal.
Personally I think it is a metal stamp pad. Maybe a second pair of eyes to confirm? At 1:31 https://www.youtube.com/watch?v=9UoF6uIQOK8.
It could have easily been celluloid or Bakelite - both had been around for decades.
Continuity mistake: Schindler is having the glass door of his office lettered. The style and size of how it is done changes when the one armed worker comes to thank Schindler as he eats breakfast.
Suggested correction: In the film, some time has passed since we see the sign being painted and the one-armed worker enter the office. Even though we don't see it happen on screen, it's reasonable to assume that Schindler had the sign redone, made larger (befitting a man of his ego and stature), in the intervening time.
