This beautifully carved scraper, missing its wedge-shaped stone blade, has an ergonomic shape that fits a (small) right-hand perfectly when held. Scrapers such as this were used for dressing hides by scraping the fat and flesh from the inside of a skin.
It has carefully formed grooves for the thumb and fingers and a slot to take a stone blade. It was shaped to fit the hand of the woman who used it.
The number 601 (or 109) in white ink is written on its flat base.
For similar examples, see "Indian & Eskimo Artifacts of North America", Charles Miles, pp.101
American Museum of Natural History, catalog No: 60 / 1523, collected in 1899.