Yup - what Glen said - one Wheeler Wilson and the rest White, though they will fit a wide age range, basically if it's White made rotary and top clamp feet - it takes that bobbin. I've got a machine from about 1910 and another from around 1940, and they take the same bobbins. I would expect the White made Kenmore (top clamp) take the same bobbin, but don't know that for sure. It is the same as the "Domestic" branded Whites too.