19th century chair unknown maker

I inherited this chair from my great uncle who developed Alzheimer’s. his house burned down and this was the one of the few things left.. he said to me when I was younger that it was a very rare and valuable chair.. he lent the chair to museums for many years.. but got it back at one point.That is all I know about it.. he was a very wealth investor and a college professor .at university of California and Berkley college... Richard Vietti ..
if anyone can tell me a possible maker that would be great..