In days gone by the scraper shave was a common sight in the toolbox. It is such a simple tool to make from readily available parts that most of the second-hand versions I have seen are user made. It is effectively a cabinet scraper held in a similar fashion to a spokeshave and used to remove tearout and tool marks prior to final sanding.
The narrow sole provides control while also allowing it to be used on concave, convex as well as flat surfaces. They are very useful for chair making and I know longbow makers use them too.