Huh, this is the second piece of Finnish design I've found in my hometown thrifts, this chair was at the Goodwill while the Lisa Johnnsson-Pape lamp was at the Salvation Army.
The chair I found is by Varjonen, a company regarding whom I can't find any info.
You can see that the back stiles are not angled inward and the top bar is a long rectangle.
The legs also attach to a support bar, not directly to the seat bottom
I asked the manager if there were any more of this chair in the back; she told me there had been a second chair but that it had sold a couple day before I came in (sigh)
The seat has some very, very light stain or water damage but I think some Howard's restore a finish will clear that.