Dummy needs info: 20 year old Barcelona Chair  

Probably alivar or steelform, looks like a higher quality repro but hard to tell. Steelforms come in 5 part frames and are chrome plated, alivars are I think single piece and plated too but that may have changed to stainless. Who makes them and who is a reseller is byzantine though.
I'd try black shoe polish and dubbin. Just make sure you've buffed off the excess black first. I think when leather cracks like that its more that its the surface coating cracking, I'm not sure how repairable that is.

Thank you Heath,
I just checked the frame, magnets do not stick, so I assume it's a stainless steel frame. Does that makes any difference?

I thought only Knoll Barcelona's have upholstery like yours with continuous edges - ie no stitching on the corners?

Not sure, can you take a photo of the screws that hold the straps in? No tiny "KP" stamped anywuhere?
Good point about the cushions. Migjt be knoll at that.

Edited until I get home and compare chairs.
Best,
Mark
 
ps nice chair.

Don't use anything oil or solvent based. There are leather dyes available, but I'd try artist's acrylics thinned with water and sparingly applied with a very small artist's brush. Experiment for color and consistency by testing on small areas of the underside. When dry, rub with a white cotton rag to test whether it will transfer onto clothing. If that all seems to work, apply a quality leather conditioner like Lexol according to directions and buff thoroughly with a horsehair brush as a final finish.
I actually did this to the cushions on my Eames lounge years ago with pretty good results. The goal is to color the exposed areas rather than to leave an actual film, but it is a cosmetic treatment only. Once the matrix of underlying fibers begin to break down, I don't think there's much that can be done to stop the process.
Best of luck. Good chair no matter the maker.

Hi.
 
Any chance of a picture showing the alignment of the cushions whilst in place (from the side).  And have you measured the chair?  Also, your lovely chair appears to be a bit older than 20 years old.  
 
Hi,
 
Mark

Thanks all for your input!!! This forum works very effectively 🙂
 
I am starting to get really curious wether the chair is original!
I cannot find any letters on the chair, except from the zipper, which says 'rapid'
I've made some extra pictures.
 
Some dimensions:
- Thickness frame-profile; 12mm X 32mm
- Max height frame: 745mm
- Width frame; 749mm
- Max distance front-leg to back-leg: 755mm
- Frame seat-height: 350mm
- Width of straps: 3X37mm
 
 
Tomorow I will search the shop for Lexol and acrylics.
 
Willem Jan

I know very little about Barcelona chairs, however one of the OP's original photos shows a distinctive pattern for the underside fabric of the seat cushion. Wouldn't that be a good reference check to a confirmed vintage Knoll cushion, or did good vintage replicas even go so far as to match the hidden fabrics.

Knoll used the hex heads like that

Hi.
 
I'd say that your chair is _________, but i'm usually wrong. 
 
Best,
 
Aunt Mark
 
ps. your chair appears to be authentic.  Treat it with love, saliva and respect..

I would agree that the chair appears to be legit. All the details are typical of original Knoll productions ie: the fabric under the seat cushion, the bolts that fasten the strapping to the frame, the piping and seamlessness of the cushions, the angle of the back of the seat cushion that contours to the frame, the type and density of the foam, the seamlessness and lack of magnetism on the frame. At least all of these details match my Barcelona chair, which is a later stamped production. Nice chair!

 
I think it looks great and really wouldn't reccomend any major intervention to cover up what are actually just normal signs of age and use, just keep it supple with some leather cream 

Hello Willem jan
i got the Same one from a auktion in The Netherlands at B.. au... 
i think you got the same chair I was a little suprised too when the Parcel service delivered it .
is it Real Or Not ?..
keep me informed
 
groeten Marco