Ah, Kitsy, you have a gem! My father and my husband both worked for Greist. The buttonholer was made with various names on it, including Singer. As far as I know it should fit all regular Singers and any machine that has the same type shank. I used it on a White and a Brother way back when. Did you get a lot of the little cams? Are they metal or plastic? I got rid of a ton of these, but may still have some kicking around, if you'd like more for different types and sizes of buttonholes and eyelets. Just PM me, and I see what I have for you. Lynn