Definitely a Singer Model 15, one of the best vintage machines. It's straight stitch, a good piecer, and excellent for free motion quilting (it has a vertical bobbin) and quilting with a walking foot. I know someone who uses hers on a quilting frame to free motion quilt. It's a sweet machine, and certainly worth having. I have one and love it, and it came with a note from it's first owner saying she hoped the person buying this machine would love it as much as she did. I do! It's a keeper.