This is a vintage"aboriginal" woman's headrest / pillow from (I believe) Kenya. Because the women had "big hair" they could not lay their heads on the ground so used these under their necks to keep their heads up, thereby protecting the hair-do. I don't know the wood, but it is nicely carved from one piece of wood and decorated with cuts. You can see "crud" in the cuts and it could be cleaned, but I wouldn't do it as in my mind it would take away from the piece to do so.
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