OH Then I have one!!! I picked up a treadle base and the lady threw in a gold T&S - I'm thinking it is a 750 or something. I'll have to test out the white cams I already have. I got the machine to work - it is noisy though - original plastic gears. I'm betting that one does some chain stitch, too. There is some funny rod like thing inside the nose. I should dig up a manual so I know what all it does.
I have a Singer - picture in the avitar with DGD cleaning out the bobbin lint - her favorite thing to do... anyway the machine sews like a dream until it skips a stitch now and then. I need to search stuff in my archives for skipped stitches. Its bugging me.