When Abigail is leaning over the counter reading her book, there is a Visa logo clearly visible on the glass display case to her right. The film is set in 1941 yet Visa wasn't invented until 1976.
The desk the Nazi gets the gun from is a Abbess model D103 made in the UK and highly unlikely to be used in a German SS headquarters.
When the Toy Maker is being tortured, the Nazi gets the gun from the desk. The desk is a Abbess model D103 made in the UK and highly unlikely to be used in a German SS headquarters.