KS Møbel/ Korup Stolefabrik/ Korup Design AS  

all of these marks are for Korup Stolefabrik.

Thank you cdsilva. Any chance of knowing which marks were used during specific timeframes?

@jbrajo Unfortunately there hasn't been any official documentation of Korups product range available anywhere in the net. Korup Stolefabrik was founded in 1948 and active until 2002. To me, the K.S. mark looks as if it was the first, but it must have had been used until the sixties. The silver sticker was used in the 90s because the company changed their name around 1990 from Korup Stolefabrik to Korup Design. Everythin else I would place inbetween. 

Who designed for Korup is also a mystery. I'm not sure how reliable the Henry Kjaernulf attribution is.

Herringbone, the DFI has two Korup chairs attributed to Kjaernulf with the following source:

Designmuseum Danmark The Library, I 17695:11, The Furniture Fair Denmark 1965 p.118

I don't know what the source is, but what would be your reason for doubting that reliability?

Just the fact that quite a few sources of the dfi have turned out not reliable. I also don’t know this source, so I can’t estimate how reliable it is. But I‘ve learned not to trust the dfi unconditionally. Although many of the attributions of course are correct.

I would love to believe the attribution by the way. Many of the small companies only worked with just one architect. So a reliable Kjærnulf attribution would increase the chance that many if not all of the famous Korup designs were drawn by Henry Kjærnulf.

@herringbone @cdsilva Thank you both for your insights.