what kind of chair is this?  

Peter Hvidt...
I am no expert but it looks like Peter Hvidt and Orla Mølgaard Nielsen for France & Søn. Congrats, nice chair you have there. You can confirm with more research. Start here: http://www.scandinavianmod.com/ec008.htm

thank you :))
Thank you for giving me an idea where to start.

artsnot is correct
The same design also came with a high back.
*Also, if you put your image link in the "associated web images" box, it will appear in your post (Plus you can resize them in photobucket to fit better. Try 400 wide if you don't want people to have to scroll the image over to see the entire picture).
Like this:

It's the kind you keep.
At least it is to my eye.
I absolutely love the color on that upholstery. I'm not sure a velour would be original, though. It's been recovered, yes?