don't know but she sure is a beaut

It's a Japanese clone, not a Singer.

My fist machine was just like this--Singer clone. I never had a bit of trouble with it, still sews beatifully. Great for piecing. Takes all singer feet and attachments.

IT is a Japanese copy of the singer 15, so the directions you can download for free for the Singer 15 will work for it. It also has the knob for lowering the feed dogs. I have a similar one and the feed dog lowering knob has "emb" for embroidery, which lowers the feed dogs the whole way. Great for free motion embroidery. Yours used to say "Lincoln" and I am sure it was named after the car, as mine is a "Fiatelli" I have also seen other car names on them!