Someone posted one of these on Instagram a few months ago, and the overall consensus was that the chair is not Jalk. At the time, I looked through multiple period catalogs with Jalk chairs and did not see this one in any of the Catalogs or books in my collection. People were leaning towards Plycraft, Mulhauser or another American maker. Then someone else chimed in that they had purchased one in Europe (which doesn't necessarily mean that its not American) So, I fairly confident that the Jalk attribution is bogus (questionable at best), but I don't have anything else to offer
Well, not super hi-res, but larger photos with some zoom on the 1stdibs link.
https://www.1stdibs.com/furniture/seating/lounge-chairs/grete-jalk-danis...
Some more photos... take forever to load on my computer though.
https://danishmodernla.com/product/mid-century-molded-plywood-sled-loung...
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