Green Model 15 is hard to find on the web as most Model 15's shown are black. I have one like the one pictured below your note that is exactly like it except is a portable with a shallow wooden base. Bought it in 1958. Quite using it when I got a Singer Touch and Sew which was a real lemon. Finally got rid of it and now have a Viking SE. You have inspired me to get that Model 15 out and get it sewing again. I need a new bobbin winder tire. Hope you enjoy yours nice green machine.