Farstrup Mobler or FDB Mobler?  

They are definitely NOT the Folke Pälsson chairs. What they do resemble is Poul Volther's model J46 for FDB. However they are not that either. The most obvious difference is the shape of the top rail.
I don't know if the Farstrup attribution is correct, but seeing as it doesn't add a lot of dollar value, I would be willing to give it some benefit of the doubt. I think I might also have seen these or similar described as by Billund.

I would say Ilmari Tapiovaara, Fanett chairs. Or most probably in the style of.
This chair has been copied a lot and there is a lot of them on the market (at least here in France). A lot of the Fanett style chairs that can be found here come with a Stol Kamnik paper label. Stol Kamnik was a yugoslavian furniture company led by the famous designer Niko Kralj. An interresting fact is that Tapiovaara and Kralj were personnal friends and Tapiovaara even worked for Stol under some UN program (A. Vodder also worked with a company in Sarajevo but that is another story).
I always have loved the look of these chairs.

Here is a marked Fanett, which also visibly different:
https://www.bukowskis.com/en/lots/434006-stolar-4-st-fanett-ilmari-tapio...
DrPoulet: are these Yugoslav chairs made with a thick beech plywood seat and layer of teak veneer on top? I ask, because the chair in question has this teak on the seat, and I've never seen a Yugoslav piece using teak anywhere, so that would be interesting.
I also like this design. In fact I have a matching armchair. The joints were loose on mine, and I was surprised to discover that the legs and spindles were originally glued in with hide glue.
Oh, and let's hear about Vodder.

Here's an even more thorough Fanett mark. It's got Edsby, and then Fanett and Tapiovaara in the upper right.

Thanks a lot guys. You've all been very helpful and I appreciate the insight.
While most likely "in the manner of" these look the closest to the Tapiovaara designed chair (the number of spindles and general shape of the backrest are very close). The seats do differ in that while these are solid the Tapiovaara seats are a ply over top of a base.
I found these photos of Stolar Fanett Ilmari Tapiovaara for Edsbyverken and while close the seat constructions do differ.
Cheers.

Apparently ( http://www.arnevodder.dk/the-story/) in the end of the 70s, Arne Vodder designed a line for a yugoslavian furniture company called Sipad (Sarajevo). According to my wife who grew up in Yugoslavia, Sipad was one the leading furniture manufacturer and retailer in Yugoslavia. "Everybody had Sipad at home " she told me. Anyway, Sipad does not exist anymore and even though I do speak serb-croatian, I have never been able to find more info about it.
Concerning the chairs, I am no wood expert but it does look like teak to me: http://www.ebay.fr/itm/Authentique-3-chaises-STOL-Stolar-Kamnik-Kralj-19...