Not Pearsall. The backs are too complex. Pearsall used rather low grade plywood for his curved back chairs and then covered it completely with fabric.
He also used walnut for chair bases and trim almost exclusively. It's really hard to tell what this wood is from these photos but I'm guessing it's something with a tinted clear finish to make it look like teak.
That style of chair base was very popular. A lot of Pearsall's pieces are close copies of well-known designer's work and the rest are derivative to varying degrees.
This chair looks like a combo of elements of a Kodawood design with some Pearsall influences borrowed from some Danish designs, and a nod toward the traditional (the tufted back cushion). If you have access to a lot of American furniture catalogs from the late 50s and 60s, you might find it in there. Or just keep searching online and maybe you'll get lucky and find a listing for one with the original tag. Do a Google image search of the back of the chair, that's the distinctive part.
If you need any help, please contact us at – info@designaddict.com