In some scenes you see soldiers that were supposed to be German Bundeswehr soldiers. But they are wearing Wehrmacht helmets, from WW II. If that was supposed to be funny, they failed miserably.
Kralle identifies a cupboard as: "This is a Hepplewhite. End of 18th century. You can see it at the doors. Well, I would say, 1794. I would say. April. More exactly, 25th April... 3 pm. 3:15. Am I right?"
Kralle must be joking: Hepplewhite died in 1786.