Other mistake: In 1902 at the German cafe, Kaunitz spits in Clive's face, and Clive promptly hits him, causing Kaunitz to fall down the steps. After this, several German students close behind Clive are wearing decorative ribbons to show their affiliations. The problem is the costuming department has used ribbons intended to mount miniature British medals for the 1914 or 1914-15 Star, British War Medal and Victory. These decorations didn't exist until 1918/1919 at the earliest. (00:36:01 - 00:38:01)
Continuity mistake: When Spud is shown tripping over the chair knocked over by Johnny at the end of the film, his feet are shown clear of it. When the shot changes as his men arrive to help him up, his feet are suddenly completely entangled within the framework.
Factual error: In the scenes set during 1918, Clive is shown wearing a typical late 1930s/WW2 military production British steel helmet with its distinctive canvas covered sprung chinstrap.
