@Wizcrafts I have very nearly restored my 168, but I'm having some trouble with getting the bobbin to rotate. I think I'm missing the hook drive shaft screw, but I'm not sure how/ where that slots in. I found this diagram for reference. I think I am missing 20055H (Which I am having a hard time finding a replacement for) and 264049 seems to be loose since the gears aren't meshing fully unless I press them together. Any advice or pictures you could share of your machine?
Full list of parts attached as well for those interested.
Singer 168W101-1 Bobbin Part list.pdf