Looks like an Albatros joystick, and the seat looks British, don’t think the Germans used wicker much, did they?

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The actual seat from Richtofen’s triplane was given to Roy Brown after the dogfight
He eventually donated it to the Military Institute institute located in Toronto Ontario Canada
It has been on display there for many decades now.
s far as I can remember the joystick is in Australia along with some other small artifacts , the rotary engine was in England along with the Spandau machine gunsThere are many bits scattered around the world and the “real” artifacts are well documented
However , as some have said there are many other “claim parts”that have no provenance