Hi,
The New England Queen Rotary is what I would refer to as a National or Eldredge Rotary made by National and USA made. Uses a special needle called Eldredge Rotary, Boye (brand name) #21, DD, or DD1221 and R221 bobbins. A more specific model can be found in the Needlebar:
http://needlebar.org/cm/thumbnails.php?album=260&page=6
The Rotary refers to the hook moving in a circular motion as compared to Oscillating moving back and forth. The motor and cabinet appear original to the machine. Nice looking set up. If considering purchase, I'd look to make certain it has a bobbin case, controller & cords and the wiring is decent if rewiring presents a problem.
Jon