Actually I am having some doubts, this watch belongs to a German friend who otherwise has nice and genuine watches and is really not into kafes, I don't know much about Lange but with the questions on the forum regarding this one I am doubting if it is a real or a fake. I didn't take a pic of the back but I recall it is is a manual wind mechanical movement, but I wasn't impressed by the finishing as opposed to the only 2 other Lange I have ever seen, last week at the Paris GTG! I assumed it could be because my friend told me this watch must be about 10 years old. If it is a fake I think my friend doesn't know either, which would be bad!...Any Lange experts to confirm? I need to know as I don't like being cheated!...thanks