My grandmother used to have one of these hand choppers. I remember chopping nuts with this handy gizmo for her when she baked. Chop nuts, onions, garlic, etc. This one has a glass jar base with a white plastic top. Produced by GEMCO in the USA, circa 1970.
In immaculate condition, doesn't appear to have been used.
Overall measures 3-3/8" x 10"