Singer 20 Class Sewing Machine Adjusters Manual.
Examples include:
* Part description.
* Set needle in needle bar.
* Formation of single thread chain stitch.
* Stitch length.
* Regulate thread tension.
* Timing the feed.
* Remove and replace looper and cloth plate.
* Hand wheel removal.
* Oiling machine.
* Trouble shooting and more.
17 page adjusters manual.
Not too bad of quality considering the manual is from the 50’s.
Take a look at the photos before purchasing.