I haven't ID'd it yet -- it has an elongated bobbin, on the arm it says 'Seamstress' and when tipped back on it's base, I find it says National Sewing machine Co, Belvedere, Illinois. There is no serial number that I can find - but it does specify that it is 'type A'. The motor has Westinghouse on it. And, it works. Sure needs a new belt and has no book with it so I don't even know how to thread it.
Derla