Hi - thanks for the links -
One of my Berninas is a 530-2 purchased new in 1962. (Of couse, a "fancier" one came out the next year!)
I purchased a used 930 Record in 2014.
I purchased a used 1006 Bernina this fall. Apparently this had been a "school" machine.
The feet seem to be interchangeable on the 930 and 530.
The 1006 presser feet (which there are only three of) only work on the 1006 - but the tops are curved like the "old" stlyle, but don't fit on the 530 or 930. Or vice-versa. I want to get a darning foot for it - but I want to make sure that it will work. I will probably bring the machine with me to a dealership and go from there.