How to dismantle a Finn Juhl Bwana chair?  

Not sure where you are from but from here where I am at (USA), people who can afford to buy this chair from an auction, can also afford to rent a van or a truck to bring this home (or in some cities a van that serves as a cab.  On this chair, personally I will not mess up with the screws, unless you can confidently put it back the right way.

Thanks, but this was not the question.

This doesn't answer your question, either, but I'll ask it: have you considered removing the passenger-side seat in your car? It might then fit.

In my chair? You mean in my car I suppose.
So please no tips how to dismantle my car but to dismantle the chair, thanks.

How far do you have to go and do you have any sort of a roof rack?  Perhaps you could shrink wrap, then blanket wrap the chair and attach it to the roof?  Just hope it doesn't rain.

There are screws under the headrest, armrests, and four points where the seat connects to the frame. There are also screws which attach the seat to the back.
There is no mechanical attachment of the top rail, it is held on with gravity/ pressure.
 
You can certainly take it apart, and I have had to assemble/ disassemble them in the past, but I would only do so if you have exausted every possible option for moving it intact. If it has been assembled for many years, there is always a possibility to create loosness in joints which you would not want.
 
The Bwana is a great chair, and a pleasure to live with. Good luck and enjoy!

Dear folks, please stop giving me advices regarding my car, it's a BMW Z4 so no chance at all.
So once more: how to dismantle the chair? Thanks a lot!

Many thanks pegboard modern!

are we going to get a follow up email from the recipient asking how to reassemble said chair?  
I have shipped bunches of chairs and there is no chance I would take that particular chair apart.  
But of course, that's just me.

You are welcome yerblues.
While we are discussing the Bwana, I'll share this picture of mine. Besides being entirely original, in great condition with a lovely patina to the leather and having the ottoman (greater comfort) one of the most interesting things about this example is the lack of visible hardware.
It does knock down (as the design was always intended to do) but the hardware is concealed inside and beneath the rails and stretchers. The exposed hex head screws are not present. I've only seen a couple other examples of this type of construction and I assume it is the earliest version. My guess would be that it proved to be more labor intensive or expensive to make them in this manner and a decision was made to allow the hardware to be exposed.
I think it is a small difference, but one which makes the chair look more refined and more like a fine cabinetmaker piece than an industrially produced chair that comes apart.
 

Thanks pegboard, that's very interesting indeed.
I suppose the early versions of France & Son have been constructed in a more professional way, later they changed to a simple construction due to export reasons, actually France & Son was the "Ikea" of the fifties.