The classic Eames chair is Brazilian rosewood and black leather, as introduced in 1956. The BR/black was the color that Charles Eames considered the best wood/color combo. Herman Miller has never stopped making them.
The one pictured is 100% a Brazilian Rosewood, legit Herman Miller piece. They stopped making the Brazilian rosewood around 1990, because of the wood becoming endangered. The one shown is a post 1970-71 era one, as it has fuller stuffed cushions than the earlier all down filled version. The all down version didnt hold its shape well after a few years, and at Charles Eames request, they switched to a down and soft foam chips mix for a filler. An all down filled one will always have a more "tired" look to the cushions. The table next to the chair is also a Herman Miller built Isamu Noguchi designed piece.
I have studied this chair, its evolution, slight construction changes etc in great depth, and own an original Brazilian rosewood 670/671 chair and ottoman, built in 1975. The chair is currently available in cherry, walnut, and "Santos Palisander", which is the replacement for the rosewood. The walnut and cherry dont have the swirly grain that you see in the rosewood one in the Farari house. The Santos wood comes close in grain pattern, but the reddish color is not there.
Oh, and yea, the chair is very comfortable, just ask my dog Roscoe!