I’ll go out on a limb and give my best guess. With only one photo and angle it is difficult at best. The design leads me to suspect late Georgian, or more likely mid-Victorian. Georgian ended circa 1830
and Victorian ran 1815-1914. I’d guess the chair is about an 1880-ish.
I can’t rule out a reproduction. The scroll work on the back and vertical support risers for the arms make me wonder about a reproduction piece.
More photos showing other angles and details would most likely help.
Thanks for posting