jefferson woodworking mid-century dining table and chairs

I also have this table. The Jefferson Slide is added, and they didn't make this table. The table has another stamp on the bottom. "1220-2_ _ _ (ineligible) and 'WALNUT' stenciled in all caps. I'm interested in finding out who designed or built this table. It's possible the legs are walnut, but it has a veneer over everything, with various types of wood underneath. 12/19/2021.

It's a generic mass produced mid century modern set. Sets by well known designers are nearly always well market, sets without ncompany markings like this were often made under Licence for department stores from the late 1950's though the mid 1970's.