The Janome Bobbincase 858570009 will fit quite a few models, including the popular Atelier 3. Bobbincases of this type will often suffer from needle damage. This is often caused by incorrectly threading the machine. If you don’t thread the take-up lever, for example, the bobbincase will suffer.
Here is a list of the Janome models this bobbincase will fit
MC8900
MC8200
MC8900QCPSE
MC8200QCSE
ATELIER 3
ATELIER 5
ATELIER 6
QXL605
MXL50
MC6700P
M200QDC
M50QDC
230DC
M100QDC
780DC3400QDC
