The father of the German girl is wearing a made up uniform consisting of the insignia of a SS-Obergruppenführer and a medal bar that, in this representation, was never part of a German uniform.
After the fall of the third Reich in 1945 neither this uniform or the rank insignia were used in the German army, now known as Bundeswehr.
Later he is wearing the field blouse of a soldier of the German Bundeswehr.
Later he is wearing the field blouse of a soldier of the German Bundeswehr.
When Poussey talks to the German officer at the table, he is later addressed as "Oberstleutnant" (Lt. Col.), but his shoulder flaps show no markings. Depending on whether he'd be wearing field or non-field gear, there should be two diamonds with a wreath of oak in either black or silver on them.