The cabinet is not pretty. But it looks like a standard sized White base. It looks very much like Kenmore 117.841 the pink-ish version but the slide plate is wrong.
http://sacramento.craigslist.org/atq/5109113180.html
No giggles from my shopgoodwill area lately. In fact someone in there has gotten very smart. A listing went last week for a "National" sewing machine. It was badged. But the worker knew enough about sewing machines to know it was a badge and listed what it WAS instead.