Originally Posted by
Sheluma
Tammi - I was thinking it might be a quilting foot. Somehow the opening seems too far forward, as if the needle might hit the metal, but that could be an illusion. There is a quilting guide bar piece (but no bar) to the left of the tucker. I thought it was the type that slides onto the presser foot screw, but maybe it slides onto the screw on the foot, like you said!
I think that the quilting guide bar piece you're seeing might slide onto a bar, which might be pinned by the screw, like in the 1st link I posted from the Smithsonian. I could swear I have something like that around here. I will look later. You're right, the opening does look off. It will be interesting to find out if there's a Singer part number on the back of it. It looks weird for a Singer foot.