Without seeing a photo of your chair it is quite difficult to gage, but what I've done is to search the website for non spring antique chairs for you, and you can click on the word "view" beneath each chair to see if the one you have is similar or like the chairs in one of the photo.  History regarding the age is also given and a price as to its value today.  Hopefully your chair is photographed in the web page.

http://www.landofart.com/store/item32570/Antique+Chair.html