ISMACS don't mention the needle so it's probably a 15x1 (just says "Domestic flat cams"). I just Googled for it and found a lot of information at
http://dragonpoodle.blogspot.com.au/...g-and-319.html
Yes 15x1 needles but you'll probably be upset when you see the missing light: It's rather good. You might find one though: It looks like one from an industrial.
Cheryl raves about this machine, so you might have to just buy it!