Do see a bit of Glasgow School in this and that may be a closer match than comparing to pure art nouveau chairs.
It is Spanish Colonial in style and made of oak. I would think this dates to mid to late 19th century. As such and based on where you found it,...
Not made like any American furniture from a factory that I have ever seen. The all mahogany construction inside and out makes me think Indonesian...
Neat chair with some art nouveau influence. Would say 1890 to on into the 20th century a bit.
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