I just got six Kai Kristiansen Model 42 teak chairs, probably my favorites, and right now I am in the middle of restoring them.
Looks as if someone took the France & son 136 and kind of merged it with the NV 48 sofa. Interesting.
Blackstar, You should also really check the Berlin based Auktionshaus Danninger.
One thing that leif, spanky and cdsilva pointed out is, of course, very true: There are tons of beautiful mid century
Try „chairs“ in Fehrbelliner Straße, Prenzlauer Berg. Last time I was there they had what you are looking for.
There are some dealers in Berlin who are specialized in These things. You could go there and talk to them.
And: a quick Google search will bring up some of the same chairs marked as yugoslavian.
This is Not exactly the story behind it but a Blog entry from someone who really seems to get excited over this set.
Leif: I don't know much about staining beech. But I like your analogies.
I'm reading S. Parlow here.