I’m guessing walnut.
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Based on the photos and information provided, and subject to examination, this is:
A Renaissance revival style carved walnut armchair
European, possibly Belgian, late 19th Century
The oval back with surmounted carved crest and centering an oval armorial, the trapezoidal seat with relief-carving, heavy shaped arms ending in scrolled ends with mask decoration, raised on a pierced base.
*represents a fair-market value for auction purposes; retail or asking price may vary.