View Single Post
Old 12-02-2013, 10:59 AM
  #8  
Candace
Super Member
 
Join Date: Jan 2010
Location: Outer Space
Posts: 9,319
Default

The hole on the bobbin case is supposed to assist with tension on certain embroidery type stitches and buttonholes on some machines. Vintage Bernina machines have these.
Candace is offline