Chair identification help. Perhaps Niels Koefoed?  

Is this the mark?

https://new.liveauctioneers.com/item/18051816

If so, it appears that "GLYNGORE STOLEFABRIK" could be the maker.

That GS stamp at the top of the leg is indeed Glyng

Thanks modernefamilie and leif. I don't think it's Glyng

So that piece of wood looks like mahogany or one of its substitutes. How about a similar close up of the backrest so we can we the primary wood.

If it is also mahogany like, the chair is not Danish.

Here are a couple shots of the backrest. I'm afraid I'm not good on wood identification. Interesting that you think it might not be Danish, as this would open up my search. I'd simply assumed as much because of the lines of the chair. So many thanks for the help.

How about a close up of the center of the backrest?

Thanks again Leif. Here are some more photos. One of the back/middle of the backrest and a top view, plus the middle of the seat stay.

I am pretty sure that is mahogany or one of its substitutes. So that probably means it is not Danish. I am not sure what it would be....