It's not Finn Juhl. I reupholstered one years ago that wasn't marked and I kept an eye out for more of them because I was curious. I seem to remember that I eventually saw one online that was marked Norway, but that's all I can tell you about them. Well, that and the backs are a trip to redo, mostly round where that notch in is on the sides. I've seen these redone spectacularly badly.
Here are some photos of the one that i redid. The yellow-gold cotton fabric was original. There is a gusset at the notch on the side of the chair because the fabric can't stretch over the compound curves.
The original latex foam was so dry that it was like scraping really stale cornbread off a baking sheet. Ugh.
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