ID Help: Not quite a Falcon chair?  

Hello everyone! I'm coming out from lurking in hopes one of you might be able to help ID this chair I picked up last weekend. At first glance I thought it was a Sigurd Ressel “Falcon” chair for Vatne Møbler, but the details aren't quite right ... the sling is attached to the frame with hex hardware instead of the “ring” style mounts, the curve of the back uprights is far too angular, and so on.
I know Vatne Møbler produced other chairs similar in design to the Falcon. Any ideas on if this may be one of those or something else entirely? I'd appreciate any help I can get.
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