What is this chair worth? It has been passed down for generations.

Apologies for any glare - I only had one chance to take these pictures before I had to leave the state.

My SO's mother has had this chair for several years now. She got it from a good friend, who got it from his grandfather - so it is at least 100 years old. We don't know where it was initially made, and my own mother has a similar one that was passed down from her grandparents - they lost much of their livelihood during the Great Depression when the stock market crashed, but managed to hold onto that particular chair. Any information on its worth would be great!

tl;dr what is this chair worth? It has been passed down for generations.