Non-width-adjustable Tongue-cutting plow (or plough) plane, for use with ONE size of flat board.
The flat metal sides ARE the fences.
The handles look like they are in the correct orientation to use the plane by PULLING the tool towards you, similar to a spokeshave. You'd probably have to use that tool in a sit-down type workbench, again similar to using a spokeshave.
IMHO.
