Wow, Jaynie, that 503 was really uptown for the day. I, too, sewed on a treadle at school. Then we progressed to the 301s. There was one "more advanced" machine that only those who had them at home could use. I don't remember, but it was probably a Pfaff or a Necchi machine. The very first machine I sewed on at home was a Blue Grass. Do any of you remember that one. It looked very much like the little Singer.