Factual error: A toy modern four-door automobile and a clear plastic ball can be seen as the children play when the Burgermeister comes in on his wheelchair. Both unlikely for a story set (presumably) in the 1800's, at the latest.
Factual error: When Scrooge is in the carriage with his girlfriend in the back, on the hill you can see a white van go past.
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Suggested correction: I have replayed that scene over and over and I couldn't see a white van pass by.