I also like the grey background. It makes the star stand out..... lovely.
The machine you have is a Singer model 15, as others have said. I see a belt... is it a treadle machine? The 15-91 has a potted motor, looks like a round bulge on the back. I own 2 15-91s and bought a 3rd for my SIL that would come over and FMQ on mine all the time. You'll love your machine. It is very easy to clean up and oil.... they do quilting much better than any of the fancy $$$$ machines I have. It is easy to find manuals and parts if you need them.
I hope you'll enjoy yours as much as I enjoy mine.