This presser foot mounting bracket will not have a small notch cut-out on the upper back side.  Clamps on just like your current feet.

Fits following old style Bernina models:
530, 530-2, 531, 532, 532-2, 534, 540, 540-2, 542-2, 600, 610, 614, 640-2, 642-2, 644, 700, 707, 708, 709, 717, 718, 719, 730, 731, 732, 741, 742, 744, 800, 801, 801s, 802, 802s, 803, 803s, 807, 808, 809, 810, 811, 811s, 817, 818, 819, 830, 830e, 830H, 831, 832, 840, 841, 842, 850, 900, 900E, 910, 910N, 930, 931, 932, 940, 950, 1000, 1001, 1004, 1005, 1006, 1008, 1010, 1011, 1020, 1030, 1031, 1080, 1090, 1120, 1130, 1230, 1260, 1530 & 1630.