Lower Knife For Bernina Bernette 003, 004, 007D, MO-334 Sergers #50145403 Lower Knife For Bernina & Bernette Portable Home Sergers / Overlock Machines. Part # 50145403 For Bernina & Bernette models : 003, 003D, 004, 004D, 006D, 007D, 008D, 009D, 700D, 800D, 800DLM 1100D, 1200DA, 1300DC, MO-334, MO-334D, MO-335, 2000DE, 2500DCE and more. All the shipments are sent from New York, USA.