I have an older Bernina walking foot (10 yrs?)- before they came out with the open toe sole plate attachment. Will the new stitch in the ditch attachment fit on my older model walking foot?

Welcome to the board from Southern California!

I don't know. I have a newer model and it fits mine. Hopefully someone on here can help you

I own a new and had an old Bernina and as I understand the new machines use a longer foot to accomodate the needle threader. The older machines use a short shank foot.

I agree with sammygirlqt, the older models and newer models are different.

Welcome from Michigan.:)