Can you find a serial number someplace? Did it come with a booklet? I recently visited family and was using a borrowed older machine that hadn't been serviced in awhile. Fortunately, the loaner sent along the book that came with the machine, so I could ascertain that it was an early 1970s machine. If I hadn't had that, I would have tried to find the serial number (which often has a model number on the same metal plate).

Also, I just did a Google search for New England Queen Rotary and came up with some hits. Have you tried that route yet?

Donna