This is Penny's husband Don, adding a little information . Thank you for your compliments all. The final determination as to what it is was made when some other members on a leather crafting forum I joined saw the photos. A link was posted to the international sewing machine collectors where I saw a photo of different pinking machines. Among them were Singers, this one, and I think others too. Really a treat to see old photos of machines we didn't even know existed. Penny and I love collecting old sewing machines and sewing accessories. This will be displayed proudly with our stuff. Don