Bernina - Rotary Bobbin

Genuine Bernina metal bobbins, narrower than their standard type, 
NOTE:  Bernina have recently discontinued supply of the original smooth bobbin which was for models 1000 and 1001
They are now supplying the same size bobbin but with holes, as shown below

This type of bobbin is correct for Bernina models: 1000, 1001, 1630, Artista 180, Artista 200