I have a Viking SE, A Viking 936 serger, a Janome "My XL 23 L", a Singer Feather Weight(my dad bought it for my mom in 1940 and I learned to sew on it and did so for years) , and My great-gm Treadle, which I am not sure whether it is a singer or a "sob" ( some other brand)...the markings have been cleaned off.