As I said in a previous post, JAF sells authentic Bernina bobbins. I have a Bernina 1020 and a 1530.
http://www.joann.com/viking-andamp-b...g/2384824.html
If you go into the store, you will see little diamond patterns engraved on the inside curve. These are the bobbins I have used for over 15 years. Wait until notions go on sale or use a coupon when notions are not on sale. Enjoy your Bernina. It is the BEST DSM I ever bought. LOVE IT!