This is the Bernina CB Bobbincase. It will fit a wide range of models, as listed below.
Older Models
530 – 600 – 801 – 801 Sport – 802 – 807 – 830 – 900 – 910 – 930
1005 – 1008 – 1008S – 1010 – 1015 – 1020 – 1030 – 1130 – 1230 – 1530
Later Models
125 – 135 – 145 – 215 – 220 – 230 – 240
325 – 330 – 335 – 350PE – 380
150 – 153 – 153QE – 160 – 163 – 165 – 170
430 – 440QE – B555
