Old Style Bernina Presser Feet
I have learned that the "newer" "old style" presser feet will fit on a 1960-ish 530-2 Bernina and a 1985-ish Bernina 930. However, the "old style" presser feet that fit on those two machines would NOT fit on a Bernina 1006. That one required the "newer" "old style" presser feet with the numbers on the white shank part of the presser feet.
The "shoulders" on the presser feet are slightly different.