Thanks to its narrow, centrally positioned toe, Zipper foot #4 can stitch very close to the zipper coils, allowing it to sew the zipper on neatly.
A Guide to BERNINA Zipper Feet - WeAllSew
Snap on Narrow Zipper Foot fit Bernina OLD STYLE 830 730 930 931 932 and many others
Zipper Foot (Snap-On) - 5mm - Red Deer Sewing Centre
Bernina Feet & Attachments – Central Michigan Sewing Supplies Inc.
A Guide to BERNINA Zipper Feet - WeAllSew
5 Minute Guide to Sewing Machine Feet - Suzy Quilts
Zipper Foot (#4) For Bernina Sewing Machines., Zipper foot # 4 makes quick work of inserting zippers neatly and precisely. Its narrow, centrally
Zipper Foot #0025797000 (#4) For Bernina Sewing Machines Old Type
Bernina Presser Foot #4 Zipper
4 BERNINA Zipper Sole - Bernina - 0327127100
Bernina – Foot – #14 – Zipper Foot with Guide – RED – My Sewing Room
7) BERNINA presser feet -- Zipper foot #4