Welcome to the Board! From what I can see here:
http://ismacs.net/sears/sears.html
I'm guessing a "Minnesota A" (or Davis Model E made for Sears). But the drawing I'm comparing your machine to isn't all that great. If you search for Davis Model E you might find additional pictures to confirm.
If you're looking to sell it, you're likely wondering what it's worth. That's a question that comes up regularly, here's a post with a few responses to that question.
Revere Precision Super De Luxe