Antique Chair

My roommates and I were given four of these chairs and two accompanying head and foot chairs (which I will post shortly) to go around an antique table (that I will also post) we were also given to store by a friend for the summer. He says that the chairs belonged to his grandparents or great-grand parents. He claims they are valuable, although I have to admit I know absolutely nothing about chairs. If you know anything about these chairs, let me know!