I would think the "hook" is too short to mix anything? Also what is the function of the wire "foot pedal" . Yes the letters on the casting will be a good help.A Google search under "primitive hand mixer" images brought up one pic of our mystery tool. It was identified as an "antique primitive hand crank gear mixer whisk kitchen tool" So there you have it...… a positive id.
After more than an hour of searching antique mixers, dough mixers, candy, paint, …… and so forth, I'm leaning toward maybe a dough mixer or a mixer for some other type of thick liquid or semi-fluid material.
Patrick, I see some letters in the one pic. What are they?